Thomas Eagleton, American lawyer and politician, 38th Lieutenant Governor of Missouri (born 1929)

Thomas Francis Eagleton was an American lawyer who served as a United States senator from Missouri from 1968 to 1987. He was briefly the Democratic vice presidential nominee under George McGovern in 1972. He suffered from bouts of depression throughout his life, resulting in several hospitalizations, which were kept secret from the public. When they were revealed, the McGovern campaign was humiliated, and Eagleton was forced to quit the race. He later became adjunct professor of public affairs at Washington University in St. Louis.

The lieutenant governor of Missouri is the first person in the order of succession of the U.S. state of Missouri's executive branch, thus serving as governor in the event of the death, resignation, removal, impeachment, absence from the state, or incapacity due to illness of the governor of Missouri. The lieutenant governor also serves, ex officio, as president of the Missouri Senate. The lieutenant governor is elected separately from the governor, and therefore may be of a different party than the governor.