President Trump said in a Saturday morning tweet that Attorney General Jeff Sessions "doesn't understand what is happening underneath his command."

"Jeff Sessions said he wouldn’t allow politics to influence him only because he doesn’t understand what is happening underneath his command position. Highly conflicted Bob Mueller and his gang of 17 Angry Dems are having a field day as real corruption goes untouched. No Collusion!"

The big picture: The already-present tension between the president and Sessions has been rising in recent days, with lawmakers weighing in on the possibility that the attorney general could be booted from the Department of Justice after the midterms.