Democrats have now raised over $90 million since the day Joe Biden dropped out of the race and endorsed Kamala Harris

Democrats are rallying behind Vice President Kamala Harris following President Joe Biden's surprise announcement on Sunday that he is ending his struggling reelection campaign.

These historic developments are energizing Democrats and revitalizing their efforts to defeat former President Donald Trump and his running mate, Ohio Sen. JD Vance.

Harris' newly launched campaign reported raising $49.6 million in grassroots donations in less than a day since its launch.

The Democratic fundraising platform ActBlue processed $67 million in contributions on Sunday alone, according to an automated tracker. This marks the single best day for the site since online record-keeping began in 2020.

Some major Democratic donors, who had previously paused their contributions due to concerns about Biden, are now ready to back Harris, including heiress Abigail Disney, according to CNBC.

Meanwhile, Republicans are scrambling to retool Trump's campaign, initially built to defeat Joe Biden, into one capable of taking on a very different candidate.

This momentum might explain why West Virginia Sen. Joe Manchin, a former Democrat turned Independent who indicated on Sunday that he was open to challenging Harris for the Democratic nomination, seems to be reconsidering.

Former House Speaker Nancy Pelosi, D-Ca., has officially endorsed Kamala Harris to lead the Democratic ticket in the race against Donald Trump.

"Today, it is with immense pride and limitless optimism for our country’s future that I endorse Vice President Kamala Harris for President of the United States," Pelosi said in a statement. "My enthusiastic support for Kamala Harris for President is official, personal, and political."

As one of Biden’s closest allies, Pelosi's backing is a crucial vote of confidence for Harris as the Democratic Party unites around her after several weeks of infighting and mounting pressure on Biden to withdraw from the race.

Pelosi's endorsement comes as several other top Democrats, including former President Barack Obama, Senate Majority Leader Chuck Schumer, and House Minority Leader Hakeem Jeffries, have yet to announce their endorsements.