The Senate Races That Will Determine Control of the US Senate

Pennsylvania, Georgia, Arizona, and Nevada are the remaining toss up states where Republicans were kind of within the margin of taking those seats. CNN's John Sutter: What stands out to you in these as yet unresolved Senate races that will determine control of the US Senate? The way I've been thinking about it is, let me share with you the four Senate races that all pollsters were paying attention to," he said.