A period of high-level diplomacy on the Middle East opens in New York on Monday, promising further insights into an emerging strategy from Barack Obama’s administration that is already raising concerns among Israel’s supporters.

On Monday, King Abdullah of Jordan said the US was promoting a “57-state solution” in which the entire Muslim world would recognise Israel. But he also warned that the new US administration had little time, before fresh violence erupted, to promote a two-state solution to the conflict between Israel and the Palestinians.