Simply put: Republicans agree not to vote on a replacement for Ginsburg until January; Democrats agree not to pack the Court.
Democrats Scuttle Marijuana Decriminalization Vote Over Fears of Not Being Deferential Enough to Cop Lobbyists
If Congress is too afraid to vote on marijuana reform, how the hell are they ever going to pass policing reform?
2016: Fill it. 2020: Don't fill it.