MSNBC anchor Andrea Mitchell on Wednesday called the decision by Sen. Bernie Sanders Bernie SandersMcConnell accuses Democrats of sowing division by 'downplaying progress' on election security The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters Why Democrats must confront extreme left wing incitement to violence MORE (I-Vt.) to suspend his 2020 presidential campaign, leaving former Vice President Joe Biden Joe BidenCast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response Biden tells CNN town hall that he has benefited from white privilege MORE as the presumptive nominee, a "worst-case scenario" for President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE.

Mitchell's comment came after Jim Messina, the campaign manager for former President Obama in 2012, called Sanders's dropping out Trump's "worst nightmare."

“On President Trump, this is his worst nightmare, right?" Messina told Mitchell during an exchange on MSNBC. "The Ukraine stuff, everything else he’s been doing for the past year-and-a-half trying to make sure Joe Biden is not his opponent, and this morning it is clear Joe Biden will be his opponent, which is the best-case scenario for the Democrats.”

ADVERTISEMENT

"This move by Bernie Sanders allows the two big powers in the Democratic party, Barack and in some ways as importantly, Michelle Obama, to come off the sidelines and get involved," Messina added.

"This is the worse-case scenario for President Trump," Mitchell later concurred. "But he does have a megaphone and a platform here with these daily [coronavirus task force briefings], which no matter how badly the administration is being criticized. ... He still is gaining a lot of traction and certainly shutting out Joe Biden and his campaign efforts since Super Tuesday."

Trump has seen his approval ratings improve amid the coronavirus, which has left Biden and Sanders largely sidelined and unable to campaign, though polls have generally shown Biden maintaining his lead over the president.