May defends Brexit rights offer in face of EU doubts

By Alastair Macdonald and Elizabeth PiperBRUSSELS (Reuters) - Prime Minister Theresa May defended her offer to let millions of EU citizens stay in Britain after Brexit as fellow EU leaders responded coolly on Friday to her opening move in negotiations on Britain's withdrawal.A year to the day after Britons voted narrowly for Brexit, May admitted differences at the Brussels summit over guarantees to the 3 million EU expatriates in Britain, but said they would be addressed in negotiations begun th