Lowell Palmer Weicker Jr. (May 16, 1931 – June 28, 2023) was an American politician who served as a U.S. Representative, U.S. Senator, and the 85th Governor of Connecticut.

Weicker unsuccessfully sought the Republican nomination for president in 1980. One of the first Republican members of Congress to express concerns about President Richard Nixon's role in the Watergate scandal, Weicker developed a reputation as a "Rockefeller Republican", eventually leading conservative activists to endorse his opponent Joe Lieberman, a New Democrat, in the 1988 Senate election which he subsequently lost. Weicker later left the Republican Party, and became one of the few third-party candidates to be elected to a state governorship in the United States at the time, doing so on the ticket of A Connecticut Party.