Sen. Elizabeth Warren is one of the top-tier Democratic candidates for president, near the head of the pack, along with former Vice President Joe Biden, fellow progressive Sen. Bernie Sanders and upstart Mayor Pete Buttigieg. Warren saw some of her momentum stall in national and state polls after...

Former Vice President Joe Biden, who was on the campaign trail in Iowa last week, sat down with CNBC’s John Harwood to discuss a range of topics, including trade, health care, taxes and President Donald Trump’s standing among world leaders. Biden has lagged behind Democratic presidential rivals...