Tuhia he tomokanga mō tēnei wāhanga - I muri i tana whakahaere i tētahi rangahau nui-whakapāho i runga i te mahi kino i te tīmatanga o te 1950, e rua nga wā i whai ia i te whakaingoatanga a tana rōpū hei Perehitini o te United States. I te tau 1956, i kōwhiria ia e te Democratic National Convention
hei hoa whakahaere mo te kaitono perehitini a Adlai Stevenson. I mau tonu ia i tana nohoanga o te US Senate i muri i te tiikiti Stevenson-Kefauver i ngaro ki te tiikiti Eisenhower-Nixon. I whakaingoatia a Kefauver hei tiamana o te U.S. Senate Antitrust and Monopoly Subcommittee i te tau 1957 a ko ia te tiamana tae noa ki tona matenga.