Breaking down the Democrats' big majorities after the blue wave

The results of the midterm tallies have set up a two-year power struggle between Trump's White House and the incoming Democratic Congress. Lisa Desjardins takes a look at the races and the potential size of the incoming Democratic majority.

The results of the midterm tallies have set up a two-year power struggle between Trump's White House and the incoming Democratic Congress. Lisa Desjardins takes a look at the races and the potential size of the incoming Democratic majority.