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Romney to deliver 'major' speech on Friday

MANCHESTER NH-- In what appears to be an attempt to solidify his support among Tea Party voters, former Massachusetts Gov. Mitt Romney will deliver a "major spending policy speech" on Friday evening at the Americans for Prosperity's Defending the American Dream Summit in Washington, according to his campaign. On Thursday, Romney will preview his spending policy in Exeter, NH, the campaign confirms.

Americans for Prosperity is a conservative organization originally funded by conservative billionaires Charles and David Koch, and it has helped organize numerous Tea Party events.

Romney, who will serve as the keynote speaker at the summit's Tribute to Ronald Reagan dinner, will be greeted by approximately 3,000 voters on Friday evening, according to Americans for Prosperity's New Hampshire state director Corey Lewandowski. Past keynote speakers have included Senator Jim DeMint and George Will.

"This is an opportunity for Gov. Romney and others, if they chose to come, to meet people from all 50 states. These are the types that want smaller government and economic prosperity. It's a really good opportunity to talk to an audience that they wouldn't have an opportunity to speak to. We're happy to have Gov. Romney," Lewandowski told NBC News.

This is Romney's latest move to win over Tea Party voters, a group in which his support remains isn't as strong as others. A recent NBC News/Wall Street Journal poll found that he slightly underperformed among Tea Party voters, while Herman Cain overperformed.

Fellow GOP front-runner Herman Cain is slated to speak on Saturday morning at the same conference.  Americans for Prosperity's national headquarters told NBC News that a small number of presidential candidates were invited ,and they have not yet finalized who is able to attend. Other confirmed speakers include Rudy Giuliani and Carly Fiorina.

While Romney is speaking in Washington on Friday night, his rival Rick Perry will deliver remarks across the country at an Iowa state GOP fundraising banquet -- along with Newt Gingrich, Michele Bachmann, Rick Santorum, and Ron Paul.

"This will be a contrast, where Gov. Romney will be speaking to what I would believe much larger and much diverse audience than Gov. Perry will be speaking to in Iowa," Lewandowski said.

The general fee to attend the summit and Reagan tribute dinner is $169, according to the Americans for Prosperity website.

NBC's Garrett Haake contributed reporting to this story.