Rethink on Trump hits dollar and world stocks

By John Geddie LONDON (Reuters) - The U.S. dollar headed for its worst start to a year in over a decade on Tuesday, while world stocks cemented their biggest losses in six weeks after widespread protests against President Donald Trump's stringent curbs on travel to the United States. Investors' hopes for a fiscal boost to the world's largest economy under Trump have been tempered by controversial and protectionist policies that have seen him suspend travel to the United States from seven Muslim-