President Trump tweeted this morning that Sen. Jon Tester of Montana, a red-state Democrat up for reelection, “should resign” because allegations he made against White House doctor Ronny Jackson, who withdrew as Trump’s nominee to head Veterans Affairs, "are proving false.”

The backdrop: “The White House said Friday that internal records raise doubt about some of the most serious allegations leveled against White House doctor Ronny Jackson in his failed bid to become the next secretary of Veterans Affairs," writes the AP.

Be smart: One of the reasons White House officials continued backing Jackson, even after they expected him to withdraw, was that they believed some of the allegations would prove false or exaggerated, and they wanted to set a political trap for Tester, a red-state Democrat up for election.