The president fired key witnesses from his impeachment proceedings on Friday, while the race for the Democratic presidential nomination turns to New Hampshire
The former vice president has a big lead in polls of the state, but with his fourth-place finish in Iowa, other Democratic presidential candidates are looking to erode his support among black voters.
After a fourth-place finish in Iowa, former vice president Joe Biden was more aggressive, taking shots at the Vermont senator and Indiana mayor. New Hampshire voters will make their picks Tuesday.
Lt. Colonel Alexander Vindman and his brother were fired from National Security Council staff and ambassador Gordon Sondland was recalled from Europe in moves top Democrats called shameful and weak.
President Trump has been heavily promoting policies aimed at appealing to black voters, including criminal justice issues, historically black colleges and so-called Opportunity Zones.
Seven candidates are meeting onstage in New Hampshire for the first Democratic presidential primary debate of February. The night follows a major issue with the results of the first contest of 2020.
Lt. Col. Alexander Vindman, the Ukraine expert who became a star witness in President Trump's impeachment hearing, was escorted out of the White House Friday. His lawyer said Trump sought revenge.