Rudy Giuliani, under oath, reveals baseless origins of Trump Big Lie claims

Rachel Maddow reads excerpts from the transcript of a deposition, under oath, of Donald Trump lawyer Rudy Giuliani in which he explains that he can't remember but thinks some of the conspiracy theories he pushed about the 2020 election came from social media and he didn't bother to check the truthfulness of the claims from his bombshell source who claimed the election was stolen.