Former White House adviser discusses takeaways from Jan. 6 hearings

Congressional aides say Tuesday's Jan 6. hearing will dive into how former President Trump tried to pressure state officials to overturn the 2020 election results. CBS News chief election and campaign correspondent Robert Costa reports. Then, former White House adviser and author of "Hearts Touched With Fire: How Great Leaders are Made," David Gergen, joins CBS News' John Dickerson to discuss.