WASHINGTON, March 10 (Reuters) - President Joe Biden's re-election campaign said on Sunday it raised $10 million in the 24 hours following a fiery State of the Union address, where he accused Donald Trump of threatening democracy and torpedoing a bill to tackle U.S. immigration woes.In a 68-minute address to Congress on Thursday, Biden also charged Trump, his Republican challenger in the November 5 election, with burying the truth about the January 6, 2021, assault on the U.S. Capitol and bowing to Russian President Vladimir Putin.

The fundraising haul is notable given the Biden campaign and his Democratic Party allies raised over $42 million in the entire month of January.An estimated 32.2 million people watched Biden's State of the Union speech, according to Nielsen ratings from 14 television networks, an increase of 18 percent from last year. This did not include viewers on streaming, social media and other platforms.

Leaning into its cash edge, the Biden campaign on Saturday announced a $30 million ad blitz, which will target key battleground states over the next six weeks..

Reporting by Nandita Bose in Washington, editing by Deepa Babington