one party, either biden or trump, won by five points or less. we're likely to see that go down to the 30s this time. >> i have a chart prepared for me by you folks at cook political report, which shows the diminished number. what accounts for that? i mean, why have they decreased so much in the last 25 or 50 years? >> what's happened is americans choose to live in places where their friends and neighbors agree with their political and social values. we've seen a great self-sorting of the electorate and seen gerrymandering take advantage of that sorting, compounding that by segmenting voters into heavily red or blue districts where we don't really hold competitive elections between candidates of different visions and qualifications anymore. we're essentially holding census of how many people are wearing red or blue jersey live within a set of boundaries. we're likely to see that on steroids this cycle. you know, there's this battle playing out in state capitols