President Biden's State of the Union address fueled his campaign's most lucrative fundraising day since he launched his bid for re-election, according to a campaign official.

Why it matters: In what may have been the most important speech of his presidency, Biden delivered a fiery performance that Democrats hope will mark a turning point in his re-election campaign.

• With anger, humor and frequent ad-libs that baited his Republican critics, the 81-year-old Biden seized on the stakes of the high-profile address to try to assuage voters' concerns about his age.
• Biden outlined his priorities on the economy and foreign aid, spread blame for the border crisis, and took repeated swipes at his "predecessor," without mentioning former President Trump by name.

Driving the news: The three hours surrounding the State of the Union address — 9 p.m., 10 p.m. and 11 p.m. — were the best individual fundraising hours of Biden's re-election campaign, a campaign official said.

• The official did not provide the exact amount that was raised.

The big picture: Biden's State of the Union fundraising blitz comes as he and Trump appear headed for a lengthy and expensive battle for the White House following their dominant showings on Super Tuesday.

• Biden's campaign raised $1.5 million in the 24 hours after Super Tuesday, according to the campaign official.
• Biden already has a massive cash advantage over Trump across the DNC and his affiliated committees, and saw his strongest grassroots fundraising haul in February.

Go deeper: "Outrageous": Biden repeatedly jabs Trump during State of the Union