MSNBC's Katy Tur blows giant hole through President Trump's FBI conspiracy theory

On Monday's MSNBC Live With Katy Tur, the host spoke with former attorney general Guy Lewis and Harvard law professor emeritus Alan Dershowitz about Donald Trump's continuing insistence that the FBI planted an informant in the Trump campaign to help Clinton win.

Tur poked a very large hole in the President's reasoning. "If this was a political investigation by the FBI ... if you're looking at it logically, wouldn't that information have come out before the end of the campaign? If the FBI didn't want Donald Trump elected President wouldn't they have — if this was political — leaked negative information about the campaign working with foreign governments?"

Watch below.