US House of Representatives Speaker Nancy Pelosi on Monday endorsed Joe Biden for president, joining a list of top Democrats, who have thrown their support behind the former vice president.

“Today I am proud to endorse Joe Biden for president of the United States because he will be an extraordinary president,” said Pelosi in the pre-recorded message.

Her endorsement of the Democratic presidential candidate follows that of US Senators Elizabeth Warren and Bernie Sanders, former president Barack Obama and former vice president Al Gore, who all threw their weight behind Biden earlier this month.