Joe Biden has turned the elections in the USA. After insisting for weeks that he would remain the Democratic candidate for president, he bowed to the pressure and dropped out of the race.
Here's what it means for Vice President Kamala Harris, for Democrats more broadly, and for Donald Trump.
Harris is a risk, but one that many Democrats will want to take.
The prospects of Kamala Harris being the Democratic nominee have gotten a big boost with the endorsement of Joe Biden.
He gave her his full support, considering his decision to make her vice president four years ago the best he ever made.
Harris responded by saying she was honored to have his endorsement and would do everything possible to win the nomination.
It's possible that most Democrats will follow the president's lead to avoid continued uncertainty less than a month from the Democratic convention.
But there are also risks.
Polls show Harris' approval ratings are as low as his own.
And in head-to-head matchups against Donald Trump, she ranks about the same as Biden.
The second is that Harris has struggled as vice president. Early in the administration, she was tasked with addressing the causes of the migration crisis at the US-Mexico border.
This is a daunting challenge and a number of errors and misstatements fueled criticism of it.
She has also been the administration's point person on abortion rights, a topic she has handled far more effectively. But those first impressions have remained.
Finally, and perhaps most importantly, Harris has already run for national office — her 2020 bid for the Democratic presidential nomination — and fumbled.
A lack of clearly defined vision and a poorly managed campaign caused him to drop out even before the earliest primaries.
Picking Harris is a risk for Democrats, but at this point there are no safe options. And the odds—a possible Donald Trump victory—are that high.