The national campaigns backing President Obama and Republican challenger Mitt Romney are drawing even in their fundraising prowess, but new financial filings released show that the "super" political committees supporting the GOP candidate and his party are widening the money gap over struggling pro-Democratic party organizations. 

The main pro-Romney super PAC, Restore Our Future, on Wednesday reported raising $8 million in May, giving it a total of $64 million so far. The group spent more than $55 million to defeat Romney's opponents during the GOP primary, and it is now reaping high-dollar financial aid from both veteran Romney supporters and from donors who once backed his rivals. 

A political committee backing Obama, Priorities USA Action, posted its strongest one-month total by raking in $4 million in May, a sign that Democrats had begun digging deep into their wallets after months of hesitance.