(CNN) - Mitt Romney is back on the campaign trail, this time in Virginia.
The former Massachusetts governor and 2012 Republican presidential nominee will headline a fundraiser Tuesday evening in the Richmond area for GOP Senate nominee Ed Gillespie.
Gillespie, a former Republican National Committee chairman and senior aide to President George W. Bush, was also a top adviser to Romney during the 2012 general election campaign.
This is the second time this year Romney's served as the main attraction at a Gillespie fundraiser. He headlined an event for Gillesipie in New York City in March.
Gillespie faces an uphill climb in the general election against Democratic Sen. Mark Warner.
After the fundraiser, Romney and Gillespie will join Bill Bolling at the former lieutenant governor's annual "Burgers will Bill" event. This is will be Romney's second appearance at the gathering, which Bolling has been holding for some 20 years.
Bolling was campaign chairman in Virginia for Romney in both his 2008 and 2012 White House bids.
Bolling says Romney can help bring Republicans in the state together.
"Someone like Gov. Romney is well known and well respected and he can be like a voice saying to the tea party groups, to the more libertarian Republican groups, to the more traditional Republican groups, that we all need to come together to help support Ed Gillespie in his Senate race. So I think he can be a unifying voice within the party," Bolling told CNN.
The events are being held in Glen Allen, Virginia, just outside of Richmond. The area's part of the state's 7th Congressional District, which last week witnessed a shocking upset in the GOP primary. House Majority Leader Eric Cantor was defeated by a little-known and underfunded economics professor who enjoyed some support from local tea party activists and other grassroots activists.
Bolling says he invited the candidate, Dave Brat, to his "Burgers with Bill" event, but said Brat was unable to attend.
Bolling, a longtime Cantor supporter, said he reached out to Brat after his upset victory last Tuesday.
"We want to make sure we hold that seat with a Republican congressman so I reached out to Dave and told him that I'd do anything I can do to support his candidacy," Bolling said.
Romney's appearance in Virginia comes just a couple of days after he hosted a major ideas summit at a resort in Park City, Utah, that attracted top leaders from the political and business worlds. The event also included a bunch of potential 2016 GOP White House hopefuls.
Since his defeat in the 2012 presidential election, Romney has taken on the role of Republican Party elder statesman, in hopes of helping shape the future of the party. And he has made endorsements in a number of GOP primary battles, often backing more moderate candidates, many of whom were Romney supporters during the past two presidential elections.