Joe Biden says that Margret Thatcher warned him about Donald Trump. Thatcher died in 2013. Baroness Thatcher suffered from dementia and retired from public life in 2003. It is unlikely she ever spoke with Biden. I suppose there is always the Ouija Board.
Joe’s apologists say that he misspoke, confusing Theresa May with Margret Thatcher. That doesn’t really work. They are both female. To Joe’s ear they probably both talk funny. Thatcher was a once in a generation leader. Theresa May is a political hack, kinda like Joe.
If Joe doesn’t have the wit to tell them apart, then his judgment is even more seriously flawed than people believe.