Republican presidential candidate Ted CruzTed CruzThe Memo: Trump tries to quiet race storm Cruz calls for Justice Department investigation into Charlottesville violence THE MEMO: Trump's base cheers attacks on McConnell MORE on Thursday released a new ad in South Carolina vowing not to cut "Washington deals."

"Washington deals — it's why we have a $19 trillion debt," Cruz says at the beginning of the 60-second ad titled "Stop."

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The spot shows a picture of rivals Donald TrumpDonald John TrumpIntel CEO becomes third exec to leave Trump council after Charlottesville Rupert Murdoch urged Trump to fire Bannon: report Protesters descend on Trump Tower as president returns home MORE and Marco RubioMarco RubioThe Memo: Trump tries to quiet race storm Trump tweets on trade, military, Alabama, but not Charlottesville Venezuelan leader put a hit on Marco Rubio: report MORE with Democrats, implying Cruz is the only candidate not willing to compromise.

"Some candidates have promised to cut more deals with the Democrats. Others already have," he continues. "I won't."

Cruz adds that Washington deals are bankrupting "our kids and grandkids" and talks about his own record of standing up to the Washington lobbyists, including taking on the ethanol mandate in Iowa.

"They said it was political suicide. My opponents attacked me, promising more cronyism and more corporate welfare. I didn't back down," he says. "And we won."

Cruz backed a plan to phase out the federal ethanol mandate, which requires fuel refiners to blend a certain amount of ethanol into their gasoline supply. His stance on the ethanol mandate resulted in Iowa Gov. Terry Branstad calling on voters to reject Cruz in the Iowa caucuses — which Cruz later won.

As president, Cruz says he plans to "say no to amnesty, repeal Obamacare, abolish the IRS and defend the constitution."

"When Washington dealmakers push, I won't flinch," he concludes. "I will stand firm with the American people, whether Washington likes it or not."

The ad then flashes to a soundbite of conservative commentator Rush Limbaugh comparing Cruz to former president Ronald Reagan.

"There is no other choice for you in this campaign than Ted Cruz," he says. "This is the closest in our lifetimes we have ever been to Ronald Reagan."