Trump concerns sink dollar to 2017 lows, weigh stocks

By Dion Rabouin NEW YORK (Reuters) - The dollar tumbled on Tuesday, headed for its worst start to a year in three decades, while stocks dipped as U.S. President Donald Trump added uncertainty to the market following stringent curbs on travel to the United States from seven Muslim-majority countries. Comments from Trump's top trade adviser, Peter Navarro, that Germany was using a "grossly undervalued" euro to gain advantage over the United States knocked the dollar in early North American trading