Mark Rutte

The call by Angela Merkel to reopen the European Union’s treaties in a major address to the Bundestag is already generating reaction from heads of government in other member states as they begin descending on Brussels for a two-day summit.

Ms Merkel worked the phones the day before the summit, calling several of her counterparts in an attempt to shore up support – a sign of just how precarious her position is and her need to come out of the summit with a victory following intense criticism at home for her political deal-making to win over reluctant allies.