| − | Hickenlooper, being a popular governor, was elected to the Senate in 1944, narrowly defeating [[Guy Gillette (politician)|Guy Mark Gillette]] in an election cycle where he was the only Republican who managed to oust a Democrat incumbent.<ref name="The First Hickenlooper"/> | + | Hickenlooper, being a popular governor, was elected to the Senate in 1944,<ref>[https://www.ourcampaigns.com/RaceDetail.html?RaceID=266870 IA US Senate Race - Nov 07, 1944]. ''Our Campaigns''. Retrieved February 21, 2021.</ref> narrowly defeating [[Guy Gillette (politician)|Guy Mark Gillette]] in an election cycle where he was the only Republican who managed to oust a Democrat incumbent.<ref name="The First Hickenlooper"/> |