Biden eyes red states won by Trump in 2016

[youtube https://www.youtube.com/watch?v=fSG5TRS__KQ?feature=oembed&w=500&h=281]
With President Trump defending states he won on Friday, Joe Biden went on offense in Iowa, a state now in play after the Mr. Trump won it easily in 2016. Ed O’Keefe and Omar Villafranca reports.