Challenging an incumbent president in a primary is a longshot effort doomed to fail, if recent history is any indication.
Over the last 55 years, challengers who have run against sitting presidents from their own party failed to win the nomination that cycle.
Yet U.S. Rep. Dean Phillips confirmed recently that he has been urged to consider running for president in the 2024 Democratic primary even though President Joe Biden is seeking a second term.
Phillips, 54, is a third-term moderate who represents the suburban Third District. Heir to the Phillips Distilling Co. liquor fortune, he stresses bipartisanship and has a role in House Democratic leadership. All of that made the recent news surprising, even though Phillips has not endorsed Biden and called for competition in the primary earlier this year.
But modern presidential history doesn't provide a welcoming backdrop.
Minnesota U.S. Sen. Eugene McCarthy is famous for his 1968 New Hampshire primary campaign during a cycle when Democratic President Lyndon B. Johnson later announced he was not running for another term. McCarthy didn't end up as the nominee during a chaotic cycle in which Robert F. Kennedy entered the race and was assassinated while campaigning.
Vice President Hubert Humphrey, a Minnesotan, won the Democratic nomination. But he lost to former Republican Vice President Richard Nixon that fall in a race where third party candidate George Wallace, former governor of Alabama, won some electoral votes. Nixon also easily overcame primary efforts against him in 1972 before a landslide general election win.
After Nixon resigned following the Watergate scandal, former California Gov. Ronald Reagan ran against GOP President Gerald Ford in the 1976 race. Ford won the primary and lost the general election to former Georgia Gov. Jimmy Carter.