Each of the previous four members of the U.S. House from Wisconsin quit after being elected or appointed to higher political office.
Only one (non-U.S. Senator) presidential candidate has ended the bid to run for the U.S. Senate in the same cycle since 1972.
Since 1982, incumbent Democratic U.S. Senators have won 263 of 266 nomination bids.
Over the last dozen cycles, more presidential candidates have ended their campaigns in September and October (13) than November and December (eight) with only four doing so in August.
Utah is one of three states never to elect a sitting or former U.S. Representative to the office of governor.