Former Vice President Joe Biden must really love the taste of his foot, after all, he inserts it into his mouth often enough!

This time the gaffe-prone, current Democratic frontrunner, has appeared to endorse President Donald Trump for re-election!

During a brief campaign address in Missouri on Saturday, the often-confused Biden, declared, “If you want a nominee who will bring this party together, who will run a progressive, positive campaign, and turn, turn this primary from a campaign that’s about negative attacks into one that’s about what we’re for — because we cannot get — re-elect — we cannot win this re-election — excuse me. We can only re-elect Donald Trump — if, in fact, we get engaged in this circular firing squad here. Gotta be a positive campaign, so join us.”

Biden also bizarrely described himself as an “O’Biden Bama” Democrat, transposing his name and the name of his old boss. The stammering and addlepated remarks led to renewed concerns from both Republicans and left-of-center commentators that Biden may be mentally unfit for the presidency. On Twitter, President Trump jokingly took Biden’s speech as a mangled endorsement.

“I agree with Joe!” Trump wrote, captioning a video of the address that edited out the second part of Biden’s remarks.

The president’s tweet was part of a larger effort by Republicans to point out what they see as one of Biden’s fatal vulnerabilities, along with his son’s possible corruption. Trump suggested at a Fox News Town Hall last week that Biden isn’t fit for office, saying that Biden’s numerous gaffes were indicative of a mental competency issue.

“I’m all set for Bernie, communist,” Trump began. “And then we have this crazy thing that happened on Tuesday, which he thought was Thursday. But he also said 150 million people were killed with guns, and that he was running for the U.S. Senate — there’s something [mentally unstable] going on there.”

Biden is “Not a Healthy Guy”

With Biden set to potentially deliver a knockout blow to Bernie Sanders during Tuesday’s Michigan primary, some doctors and even some left-of-center commentators are agreeing with the president’s assessment.

Former President Obama’s longtime physician has flatly remarked in an interview with The Washington Examiner that Biden is “not a healthy guy.”

“He’s not in bad shape for his age, but I wouldn’t say he’s in outstanding health,” Dr. David Scheiner said last year, after reviewing partial medical records. “Could I guarantee he won’t have issues for the next four years? He has a lot of issues that are just sort of sitting there.”

Popular podcast host Joe Rogan, who has endorsed Bernie Sanders, took the concerns a step further, saying Biden’s alleged cognitive problems were disqualifying. “Stop. Pause. He can’t be president,” Rogan said. “Listen, we can’t play any games here folks. This is a really old man who can’t even talk.”

And, last summer, The New York Times reported that many Biden associates and insiders were doubting with “significant unease” whether he would be too old to serve as an effective candidate.