http://www.usatoday.com/news/politics/story/2012-04-16/obama-dnc-fundraising-march/54312302/1 Obama, DNC raised $53M in March for campaign WASHINGTON â President Obama's fundraising gained strength in March, as he raised a combined $53 million for his campaign and the Democratic National Committee in preparation for the next phase of the campaign: the general election battle with Republican Mitt Romney. Obama's March haul is nearly twice the $29.1 million he collected for himself and the party in January. In all, he has raised more than $350 million in this election cycle for his campaign and various party accounts. Obama's camp outlined the fundraising in an Internet video Monday that featured donors who had given as little as $5. More than 567,000 people contributed to the campaign last month. Obama's campaign, however, has urged supporters to do more, noting that Republican super PACs and other GOP-affiliated outside groups are prepared to spend heavily to oust him. "We're all going to have to dig even deeper," campaign manager Jim Messina said in the video. "It's going to take all of us working together." The campaign did not disclose the size of Obama's cash reserves at month's end. Those totals and other details of Obama fundraising will become public later this week when presidential candidates file reports with the Federal Election Commission. Romney has not yet released March fundraising totals, but he had collected a little more than $75 million through the end of February. This month, he began raising funds jointly with the Republican National Committee, which will run ads and conduct voter-outreach efforts in the months ahead.