WASHINGTON -- A pair of "super" political action committees supporting top Republican presidential candidates spent nearly $24 million in January, drawing upon major gifts and repeat donations from wealthy business executives, according to financial reports the groups filed Monday with the government.

The super PACs -- Mitt Romney-leaning Restore Our Future and Newt Gingrich-supportive Winning Our Future -- raised a combined $17 million last month. That financial strength allowed the groups to hit the airwaves in key primary states with millions of dollars in expensive TV ads.

The groups' fundraising offers a periodic behind-the-scenes glimpse into the identities of the wealthy supporters who will help elect the next president, along with details on how the tens of millions of dollars they donated have been spent this election season. Restore Our Future, which spent $14 million last month, has been boosted by more than two dozen repeat donors. Winning Our Future, which spent $9.7 million, is largely supported by casino mogul Sheldon Adelson and his wife.

The super PACs, as well as other groups supporting other candidates and the individual campaigns, were required to disclose how much they raised and the identities of their donors in reports filed with the Federal Election Commission by midnight Monday.

Those reports provided a snapshot of fundraising for President Barack Obama's early campaign and for Republican candidates as they battled during important primary elections in January. During the month, Republican candidates Gingrich and Santorum had briefly surged ahead of front-runner Romney but trailed the former Massachusetts governor in fundraising. Since then, Santorum has climbed remarkably in polls as support eroded just as stunningly for Gingrich following his disappointing showing in Florida.

Restore Our Future has been a boon for Romney, who has benefited greatly from the group's TV ads attacking Gingrich in particular. Such ads were purchased thanks to the financial help of repeat donors, including Marriott International Chairman J.W. Marriott Jr., who has given the super PAC $750,000 to date.

The super PAC also reported new donors, including Hewlett-Packard chief executive Meg Whitman. Romney mentored Whitman, recently an unsuccessful candidate for California governor, during the 1980s at Boston-based Bain & Co., the private equity firm Romney headed. Whitman's $100,000 check to Restore Our Future came days after she joined Romney at a celebration of his victory in the New Hampshire primary.

Restore Our Future counted on continued support from at least 30 repeat donors who have given a combined $6.6 million in January, according to a review of the reports by The Associated Press.

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