"We are thrilled that Governor Romney has agreed to host one of his first fundraisers since the election for our party and help New Hampshire Republicans restore fiscal sanity to Concord and Washington."
According to WMUR, state Sen. Jeb Bradley "will play a major role" in the fundraiser. Bradley has long been leaning towards challenging Sen. Jeanne Shaheen (D-N.H.), but he hasn't yet made his run official.
Romney has been a frequent benefactor to the New Hampshire GOP, hosting fundraisers for the state party ahead of his participation in the 2008 and 2012 presidential primaries.
The event will come just two months after Romney hosted a retreat in Utah for top Republican donors. Attendees at that event included New Jersey Gov. Chris Christie (R), Sen. Rand Paul (R-Ky.) and Rep. Paul Ryan (R-Wis.), Romney's 2012 running mate.
Romney and top aides to his campaign also have donated in recent weeks to Ryan's reelection campaign, according to documents filed with the Federal Election Commission.
Romney donated $5,200 to Ryan, while Beth Myers, one of the campaign's top political strategists, and Spencer Zwick, the Romney fundraising chairman, each donated $2,500. The donations were made to a joint fundraising committee that splits donations between Ryan's reelection committee and his leadership political action committee.
This story was updated at 12:37 p.m.