Barack Obama's re-election campaign has exceeded its $60m fundraising target for the past three months, bringing in $86m from April to June and eclipsing his Republican contenders.
Officials for Obama's 2012 presidential campaign said it had received funds from more than 552,000 people, representing "more grassroots support at this point in the process than any campaign in political history".
In keeping with the president's 2008 winning strategy of targeting small donations, 98% of contributions in the second quarter of this year were $250 (£157) or less, with an average donation of around $69, campaign manager Jim Messina said in a video to supporters.
The figures confirm that Obama, who raised a record $745m during his 2008 bid, has started the 2012 race as the cash leader despite criticism from some Democrats that he has tilted to the right in US debt talks and worries about the economy.
The Republican frontrunner Mitt Romney raised $18.25m from April to June, and most of his party's hopefuls for the White House raised between $4m and $4.5m during the same period. Romney's rival Michele Bachmann is due to announce her fundraising total for last quarter this week.
Of the total raised for Obama during that period, more than $47m went to the Obama for America fund and more than $38m to the Democratic National Committee.
