When presidents get primaried

Joe Biden may face a challenge. Here's how his predecessors fared.

Presidential primary contenders.
(Image credit: Illustrated | Getty Images)

There are two years to go before the next presidential election and already there's an effort underway to replace Joe Biden at the head of the Democrats' ticket. RootsAction, a progressive group, announced this week it will run an ad campaign aimed at blocking his renomination. "Our immediate goal within the Democratic Party is to 'dump Biden,' much as the anti-Vietnam-War forces among Democrats set out to 'dump [Lyndon] Johnson' in 1967, which led antiwar candidates Eugene McCarthy and Robert Kennedy to enter the race," the group says on its website.

It's true that Johnson withdrew from the 1968 race in the face of massive intra-party opposition, famously declaring: "I shall not seek, and I will not accept, the nomination of my party for another term as your president." But the eventual winner of the White House in that election was neither McCarthy nor Kennedy, who was assassinated after the California primary: It was Richard Nixon, the Republican nominee. Sitting presidents don't face primary opponents very often, but it does happen. How has it worked out in the modern era? Here's everything you need to know.

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Joel Mathis, The Week US

Joel Mathis is a writer with 30 years of newspaper and online journalism experience. His work also regularly appears in National Geographic and The Kansas City Star. His awards include best online commentary at the Online News Association and (twice) at the City and Regional Magazine Association.