favors democrats two to one. but some watchers say it s election day swing votes that make the difference. and it s swing voters in these 21 swing counties that hold the keys. sprinkled across the state, iowa has 20% of all swing counties nation-wide. the state has long been pivotal. richard nixon traveled there as vice president when running for the white house. he won the state. as did ronald reagan. iowa was close to the beginngip well. he broadcast for university of iowa football this time 30s. bill clinton was the last democrat iowa picked up before obama. in the 90s he could be found sharing his home state s common rural roots on campaign stops. this year is no difference here, alex. campaigns have an eye on iowa, a state that s picked seven of the last ten presidents of the united states. so that is the common thread between those three we were talking about. richard nixon, ronald reagan, bill clinton. it s all about iowa. thank you for breaking it down.