U.S. Politics Update: Trump’s National Emergency Declaration

John Fortier, Director of The Democracy Project at the Bipartisan Policy Center, and Will Marshall, President of the Progressive Policy Institute, spar over the constitutionality of US President Donald Trump’s declaration of a national emergency at the southern border and implications of the Russia probe. They also talk with host Carol Castiel about diverse array of contenders for the Republican and Democratic primaries in advance of the 2020 presidential elections.