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 percent of Democrats and independents said they would vote for Biden in statewide nominating contests that begin next year, up 3 percentage points from a similar poll that was conducted at the end of September.
Democrats in the House of Representatives are holding hearings to investigate whether Trump improperly pressured Ukraine to investigate Biden and his son Hunter, who sat on the board of a Ukrainian energy company.