Proposal unveiled to keep Britain in EU, sceptics unmoved

By Elizabeth Piper and Jan Strupczewski LONDON/BRUSSELS (Reuters) - European Council President Donald Tusk presented on Tuesday proposals for keeping Britain in the European Union to a mixed response, underlining the challenges Prime Minister David Cameron faces to win over his people and other EU leaders. The proposals, which addressed all four areas where Cameron has demanded reform, did little to ease doubts among his more Eurosceptic lawmakers and even some of the prime minister's closest al