One Historian On The Importance Of Presidential Credibility

From claims of voter fraud to wiretapping, President Trump has made a number of statements for which he has no evidence. So his critics are asking whether this will this cost him credibility, especially if there's a crisis he must address.

Historian Julian Zelizer (@julianzelizer) of Princeton University's Woodrow Wilson School joins Here & Now's Jeremy Hobson to discuss why presidential credibility matters.