As you might vaguely remember, Rep. Dean Phillips (DFL-MN) ran against Joe Biden for the Democratic nomination for a bit earlier this year. So did Marianne Williamson, but Phillips is a three-term member of the House and the company he co-owns makes a mean gelato, so his candidacy carried a bit more weight (but not much).
Phillips didn't disagree with Biden's policies. In fact, he voted for them 100% of the time. His pitch was that Biden was too old to win the election. Everyone pooh-poohed him. Biden was in great shape and certainly not too old to win.
Phillips didn't actually want to be president. He just wanted somebody out there to prevent Biden from getting the nomination because he was convinced Biden was not up to another 4 years and could not win the election. He wanted to prevent a Trump presidency at all costs. He called Govs. J.B. Pritzker (D-IL) and Gretchen Whitmer (D-MI) to try to get them to run. Neither returned his calls. Giving advice runs in his family. His grandmother, Pauline Phillips, wrote the Dear Abby advice column.
When Phillips failed to get any high-profile Democrat to jump in, as a desperation measure, he jumped in himself. Not that it did a lot of good. For whatever consolation it might be to Phillips, nobody believed Cassandra either, even though she was right, too. (V)