In a new interview with Ian Bremmer for GZERO World, Delaware Senator Chris Coons, once an ardent defender of the filibuster, explains why he's had a change of heart on the procedural policy. The filibuster prevents a simple majority from passing legislation in the Senate, and has been a tool that Coons says allowed Sen. Mitch McConnell, then Minority Leader, to "use the power of the minority to thwart the Obama Administration's agenda." Coons says, should VP Biden win the 2020 election, "I'm not willing to sit by for four years and watch an entire administration lose the opportunity to make real change."