Presidential historian Douglas Brinkley looks at the considerable, often heroic achievements of Joe Biden, and at the mistakes that may color historians' view of his presidency, as the man Biden warned is a threat to democracy re-enters the White House.

So as we anticipate what could be the immensely consequential presidency of Donald Trump, we should close the books on this particular question. There’s never any way to prove counterfactuals, but we do have some pretty solid data rebutting Biden’s apparent belief that his self-defenestration saved Trump from defeat.

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