UPDATE 1-Biden expands edge in U.S. Democratic nomination race

Former Vice President Joe Biden expanded his lead over more than a dozen other candidates for the Democratic presidential nomination this month as U.S. House Democrats looked into allegations that President Donald Trump tried to pressure a foreign leader to investigate him, according to a Reuters/Ipsos poll released on Friday.The Oct. 17-18 opinion poll found that 21% of Democrats and independents said they would vote for Biden in statewide nominating contests that begin next year, up 3 percenta