With the addition of Gillibrand, the 2020 field ties 1972 and 2016 for the most sitting U.S. Senators running for president in the modern primary era.
In the modern primary era, only one eventual Democratic or Republican nominee was the last of his party to formally launch a presidential candidacy.
No Democratic U.S. Representative from Minnesota has ever lost a renomination bid and only two freshmen have failed to do so over the last century.
The U.S. House Committee on Elections determined fraud took place in a Rhode Island congressional race 135 years ago and ordered a new election.