campaign

Carlos Barria/Reuters

Republican U.S. presidential candidate Donald Trump’s hand is seen as he reacts during a campaign event in Harrisburg, Pennsylvania

Hillary Clinton...Democratic presidential candidate Hillary Clinton arrives at a campaign stop, Wednesday, April 20, 2016, in Philadelphia. (AP Photo/Matt Rourke)

Matt Rourke/AP

Democratic presidential candidate Hillary Clinton arrives at a campaign stop in Philadelphia 

Brian Snyder/Reuters

U.S. Democratic presidential candidate and U.S. Senator Bernie Sanders takes the stage at a campaign rally in Binghamton, New York

U.S. Republican presidential candidate Donald Trump reacts to supporters as he arrives to a campaign event in Radford...U.S. Republican presidential candidate Donald Trump reacts to supporters as he arrives to a campaign event in Radford, Virginia February 29, 2016. REUTERS/Chris Keane

Chris Keane/Reuters

U.S. Republican presidential candidate Donald Trump reacts to supporters as he arrives to a campaign event in Radford, Virginia

Democratic Presidential Candidates Hillary Clinton And Bernie Sanders Debate In Durham, New Hampshire...DURHAM, NH - FEBRUARY 04:  Democratic presidential candidates former Secretary of State Hillary Clinton walks on stage during a break as she debates with U.S. Sen. Bernie Sanders (I-VT) during their MSNBC Democratic Candidates Debate at the University of New Hampshire on February 4, 2016 in Durham, New Hampshire. This is the final debate for the Democratic candidates before the New Hampshire primaries.  (Photo by Justin Sullivan/Getty Images)

Justin Sullivan/Getty

Democratic presidential candidate Hillary Clinton walks on stage during a break as she debates with U.S. Sen. Bernie Sanders (I-VT) during their MSNBC Democratic Candidates Debate at the University of New Hampshire in Durham, New Hampshire. This is the final debate for the Democratic candidates before the New Hampshire primaries

A child sits on the ground and listens to U.S. Democratic presidential candidate Hillary Clinton speak to supporters during a campaign rally in Manchester, New Hampshire...A child sits on the ground and listens to U.S. Democratic presidential candidate Hillary Clinton speak to supporters during a campaign rally in Manchester, New Hampshire, February 3, 2016. REUTERS/Carlo Allegri

Carlo Allegri/Reuters

A child sits on the ground and listens to U.S. Democratic presidential candidate Hillary Clinton speak to supporters during a campaign rally in Manchester, New Hampshire

Students and a women police officer dance as they take part in "One Billion Rising" campaign on a street in Chandigarh...Students and a women police officer (C) dance as they take part in "One Billion Rising" campaign on a street in Chandigarh, India, February 2, 2016. One Billion Rising is a global coordinated campaign aimed to call for an end to violence against women and girls, according to its organisers. REUTERS/Ajay Verma

Ajay Verma/Reuters

Students and a women police officer dance as they take part in “One Billion Rising” campaign on a street in Chandigarh, India. One Billion Rising is a global coordinated campaign aimed to call for an end to violence against women and girls, according to its organisers

Myanmar opposition leader Aung San Suu Kyi  greets supporters and Shan ethnic minorities on arrival at Tachileik airport in Shan State to campaign for National League for Democracy (NLD) on October 21, 2015.  European Union observers will be given access to voting on military bases for next month's Myanmar election, an official said, a move to bolster oversight of a poll billed as the country's fairest in decades.

Romeo Gacad/AFP

Myanmar opposition leader Aung San Suu Kyi greets supporters and Shan ethnic minorities on arrival at Tachileik airport in Shan State to campaign for National League for Democracy (NLD) on Wednesday

Democratic U.S. presidential candidate Hillary Clinton arrives with Nevada State Assemblyman Nelson Araujo to purchase ice cream between campaign events in North Las Vegas

David Becker/Reuters

Democratic U.S. presidential candidate Hillary Clinton (L) arrives with Nevada State Assemblyman Nelson Araujo to purchase ice cream between campaign events in North Las Vegas, Nevada.

Kayan ethnic women wait for the arrival of National League for Democracy chairperson Aung San Suu Kyi during an election campaign rally in Demoso, Myanmar's Kayah State on Thursday

Ye Aung Thu/AFP

Kayan ethnic women wait for the arrival of National League for Democracy chairperson Aung San Suu Kyi during an election campaign rally in Demoso, Myanmar’s Kayah State on Thursday

UK Independence Party (UKIP) leader Nige...UK Independence Party (UKIP) leader Nigel Farage covers his ears as he campaigns in Ramsgate in south east England on May 6, 2015, on the eve of a general election in Britain. Britain's political leaders launched their last day of campaigning Wednesday for the most unpredictable election in living memory which could yield no clear winner and weeks of haggling over the next government. AFP PHOTO/ BEN STANSALLBEN STANSALL/AFP/Getty Images

Ben Stansall/AFP/Getty

UK Independence Party (UKIP) leader Nigel Farage reads a leaflet given to him by an anti-UKIP protester as he campaigns in Ramsgate in south east England on the eve of a general election in Britain.

Britain's Prime Minister David Cameron walks back onto his Conservative Party campaign bus after a factory visit whilst campaigning in Pendle in northern England, Britain...Britain's Prime Minister David Cameron walks back onto his Conservative Party campaign bus after a factory visit whilst campaigning in Pendle in northern England, Britain, May 1, 2015. REUTERS/Toby Melville

Toby Melville/Reuters

Britain’s Prime Minister David Cameron walks back onto his Conservative Party campaign bus after a factory visit whilst campaigning in Pendle in northern England 

Nicola Sturgeon, the leader of the Scottish National Party, launches her party's final poster at a campaign event in Leith Walk Edinburgh, Scotland...Nicola Sturgeon, the leader of the Scottish National Party, launches her party's final poster at a campaign event in Leith Walk Edinburgh, Scotland, April 30, 2015. REUTERS/Russell Cheyne

Russell Cheyne/Reuters

Nicola Sturgeon, the leader of the Scottish National Party, launches her party’s final poster at a campaign event in Leith Walk Edinburgh, Scotland 

Nick Clegg Visits A West Country School With His Wife...CHIPPENHAM, ENGLAND - APRIL 29:  Deputy Prime Minister Nick Clegg (C) and his wife Miriam Gonzalez Durantez help make a crumble at Ivy Lane Primary School as he canvasses with local Liberal Democrat candidate for Chippenham Duncan Hames (R) on April 29, 2015 in Chippenham, England. As the campaign enters the final days, the country's political parties are stepping up the campaign to appeal for votes from the indecided electorate.  (Photo by Matt Cardy/Getty Images)

Matt Cardy/Getty

Deputy Prime Minister Nick Clegg and his wife Miriam Gonzalez Durantez help make a crumble at Ivy Lane Primary School as he canvasses with local Liberal Democrat candidate for Chippenham Duncan Hames on Wednesday in Chippenham, England 

A child of a party activist waits for Britain's Prime Minister David Cameron to deliver a speech at a regional campaign launch in Penzance on Thursday in Penzance, England. Britain goes to the polls in a General Election on May 7

Toby Melville/Reuters

A child of a party activist waits for Britain’s Prime Minister David Cameron to deliver a speech at a regional campaign launch in Penzance on Thursday in Penzance, England

A dog and supporters wait for the arrival of Labour Party leader Ed Miliband in Crouch End, north London as part of his General Election campaign tour.

Stefan Rousseau/PA

A dog and Labour supporters wait for the arrival of party leader Ed Miliband in Crouch End, north London as part of his general election campaign tour

The Labour Party Launch Their 2015 General Election Campaign   ***BESTPIX***...LONDON, ENGLAND - MARCH 27:  Ed Miliband, leader of the Labour Party, arrives at the launch of his political party's general election campaign at the ArcelorMittal Orbit at Olympic Park on March 27, 2015 in London, England. Speaking before Monday's official start of campaigns for the May 7 general election, when Parliament is dissolved, Mr Milliband pledged to prevent further privatisation of the National Health Service.  (Photo by Rob Stothard/Getty Images)   ***BESTPIX***

Rob Stothard/Getty

Ed Miliband, leader of the Labour Party, arrives at the launch of his political party’s general election campaign at the ArcelorMittal Orbit at Olympic Park in London, England 

Lesotho Prime Minister and leader of the All Basotho Convention (ABC) Tom Thabane supporters cheer through the streets of Maseru during a general assembly elections campaign gathering on February 26, 2015 in Maseru, Lesotho. Voters from the Kingdom of Lesotho will head to the polls on February 28 to elect a new parliament.

Gianluigi Guercia/AFP

Lesotho Prime Minister and leader of the All Basotho Convention (ABC) Tom Thabane supporters cheer through the streets of Maseru during a general assembly elections campaign gathering on Thursday in Maseru, Lesotho. Voters from the Kingdom of Lesotho will head to the polls on Saturday to elect a new parliament

Japan PM Abe eats a local grilled fish during his official campaign kick-off for the Dec 14 lower house election, in Soma...Japan's Prime Minister Shinzo Abe, who is also leader of the ruling Liberal Democratic Party (LDP), eats a local grilled fish during his official campaign kick-off for the December 14 lower house election, at the Soma Haragama fishing port in Soma, Fukushima prefecture, December 2, 2014.    REUTERS/Issei Kato (JAPAN - Tags: POLITICS ELECTIONS FOOD TPX IMAGES OF THE DAY)

Issei Kato/Reuters

Japan‘s Prime Minister Shinzo Abe, who is also leader of the ruling Liberal Democratic Party, eats a local grilled fish during his official campaign kick-off for the December 14 lower house election, at the Soma Haragama fishing port in Soma, Fukushima prefecture. 

Yes voter Duncan Thomson waits for the doors to open at St Martins Church hall polling station, as the people of Scotland take to the poles to decide whether Scotland should become an independent country, on September 18, 2014 in Renton, Scotland. After many months of campaigning, final opinion poles show the referendum result is still  too close to call.

Mark Runnacles/Getty Images

Yes voter Duncan Thomson waits for the doors to open at St Martins Church hall polling station in Renton, West Dunbartonshire, as the people of Scotland take to the polls to decide whether the country should become an independent nation