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 she rolled out her proposal to pay for “Medicare for All” in early November and a subsequent plan detailing how she would transition the American health care system to a single-payer model. She also got into high-profile, public battles with billionaires such as Leon Cooperman and Lloyd Blankfein. With the Iowa caucuses coming in early February, the Democratic presidential candidates, particularly those at the top of the field, are scrambling for support among the party’s rank and file. Over the weekend, Warren sat down with CNBC’s John Harwood at the Erickson Community Center in Clinton, Iowa, to discuss the state of her campaign, her vision for remaking American capitalism and what she thinks of impeachment proceedings against President Donald Trump.