Trump tries to rally support for healthcare bill

By Susan Cornwell and Yasmeen AbutalebWASHINGTON (Reuters) - President Donald Trump tried to rally Republican lawmakers behind a plan to dismantle Obamacare on Tuesday as U.S. stock markets showed their worst one-day performance since the November election.Trump is trying to win the first major legislative battle of his presidency.In one of the few visits he has made to the U.S. Capitol since taking office two months ago, Trump told fellow Republicans in the House of Representatives on Tuesday m