Rep. Adam Schiff Adam Bennett SchiffTop Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence Overnight Defense: Top admiral says 'no condition' where US should conduct nuclear test 'at this time' | Intelligence chief says Congress will get some in-person election security briefings Overnight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies MORE during an appearance on NBC's "Meet the Press" said that he thought a critical tweet President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE sent earlier Sunday was a threat as guests on the political talk shows also focused on the possibility of witnesses in the Senate impeachment trial.

New polling in the Democratic presidential primary was also unveiled ahead of the first-in-the-nation Iowa caucuses, and a top health official weighed in on the coronavirus outbreak.

Read The Hill's complete coverage below.

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Schiff says Trump tweet is 'intended to be' a threat By REBECCA KLAR House Intelligence Committee Chairman Adam Schiff (D-Calif.), who has taken a leading role in the Senate impeachment trial of President Trump, said Sunday that a tweet from the president is "intended to be" a threat. Read the full story here

Lofgren says senators should vote for witnesses as a 'favor' to the country By REBECCA KLAR Rep. Zoe Lofgren (D-Calif.), a House manager presenting the impeachment case against President Trump, on Sunday urged senators to vote to compel witnesses and documents as part of his trial in the upper chamber, saying it would be a "favor" to the country. Read the full story here

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GOP senator defends Trump after release of Parnas recording: 'Certainly the president meets a lot of people' By REBECCA KLAR Republican Sen. James Lankford (Okla.) defended President Trump Sunday amid newly released audio of a conversation between Trump and Lev Parnas that raises questions about whether Trump lied about not knowing the indicted businessman. Read the full story here

Sanders leads 2020 Democrats by 5 points in New Hampshire: poll By KYLE BALLUCK Sen. Bernie Sanders (I-Vt.) leads his closest challenger in the 2020 Democratic presidential primary field by 5 points in New Hampshire, according to a new poll. Read the full story here