Can anyone stop Biden?

Experienced presidential strategists told Reuters that while they expect some other Democrats to eventually become top contenders, Biden’s strength is likely sustainable.

They cited two main factors: The massive Democratic field makes it difficult for any one candidate to stand out, and voters tend to be risk-averse when seeking a candidate to topple a sitting president.

In recent elections, early front-runners such as Democrat Al Gore, himself a former vice president, in 2000 and Republican Mitt Romney in 2012 largely kept a lock on the nomination, despite some bumps along the way.

In 2008, Democratic favorite Hillary Clinton was overtaken by Barack Obama to secure the nomination, but Obama took advantage of a relatively small field to steadily amass support as the top alternative to Clinton. When Clinton ran again in 2016, Sanders tried to do the same thing with a similarly small field and almost succeeded.