But the organization also expects to see its coffers filled with a glitzy New York City fundraiser that will feature two of the Republican party's rising stars. The event, to be held at the Waldorf Astoria, will be an intimate affair of around 75 people. The senators are expected to provide a strategy and polling briefing, according to the Wall Street Journal.

Both senators have appeared frequently on the campaign trail with Romney, and, hailing from crucial swing states, considered top contenders for his vice presidential nomination.

Restore Our Future was a potent weapon for Romney during the Republican primary, spending more than $40 million to aid his candidacy. The group has far outpaced fundraising on the Democrats' side, leading to some fears among the Obama team that they could be dramatically outspent by November.