Supporters of President Donald Trump held a “Pittsburgh Not Paris” rally across from the White House on Saturday to thank the president for his decision Thursday to withdraw the U.S. from the Paris Agreement on climate change.

The rally’s name referenced a phrase Trump used during his speech Thursday in the Rose Garden of the White House, in which he said, “I was elected to represent the citizens of Pittsburgh, not Paris.”

“By the action the President took this week, the American people and the world will see once again that our President is choosing to put American jobs and American workers first.”

Rally attendees cheered the president for fighting for American jobs and industry.

“That was a promise kept,” attendee Marilyn Ochs from Bethesda, Maryland, told the Pittsburgh Post-Gazette. “He’s our last hope.”

Ochs also expressed her frustration with the Republican establishment, saying, “We gave the Republicans the House, and they stabbed us in the back. We gave them the Senate, and they stabbed us in the back. We gave them 33 governorships, and they stabbed us in the back. [Trump] is our last hope … We will never turn on him — ever — because we know what he is.”

“Great to see support for @POTUS decision on the Paris Accord at the White House today. #PittsburghNotParis,” Republican National Committee Chair Ronna Romney McDaniel tweeted.

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“Pro Trump rally happening in DC outside of the WH now. #PittsburghNOTParis,” radio host Howie Carr tweeted.

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The rally was organized by the Fairfax County Republican Committee and the Republican Party of Virginia.

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Matt Ames, chairman of the Fairfax County Republicans, told the Post-Gazette the rally came together “on 24 hours’ notice.”

“We’re a county party; we don’t have a huge infrastructure. We did it to see what would happen, and people came from out of town. I think it’s great,” Ames added.

The rally’s official invitation read, “As you know, the President has been under siege from the mainstream media and the Democrats, especially now that he put American jobs first by withdrawing from the Paris accord. Therefore, we are organizing a group to demonstrate our support for President Trump and his fearless leadership.”

Washington, D.C.-area resident Jeff Miller told the Post-Gazette, “It’s nice to see a president who keeps his word … on issue after issue, he’s following through.”

The campaign asked supporters in an email to show up “in your most patriotic, red, white, and blue outfit.” Many of the attendees carried American flags and Trump campaign placards that read: “Make America Great Again,” “Promises Made, Promises Kept,” “Thank You, Mr. President,” and “America First.”

The crowd also burst out in chants of “USA! USA!”

The Donald J. Trump for President campaign released a statement thanking the groups and the president’s supporters for organizing and attending the rally, saying, “On Saturday, June 3rd, supporters came out to thank President Donald J. Trump for putting the American people first.”

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“Thanks to President Trump, the American taxpayer will no longer be captive to the burdensome Paris accord,” the campaign’s statement continued. “By the action the President took this week, the American people and the world will see once again that our President is choosing to put American jobs and American workers first.”

Attendees were warned to be on the lookout for potentially violent or aggressive left-wing #MarchforTruth protesters who gathered close by to denounce the Trump administration.

“We might engage today with some people who aren’t happy we’re here,” an unidentified organized said over a megaphone, reported The Hill. “I want to ask people to just not engage if someone tries to provoke you. Focus on what we’re here to do.”