An anti-Trump group of Republicans will be running an ad campaign calling for witnesses in the Senate impeachment trial starting Thursday morning.

Republicans for the Rule of Law have funded three ads that will air dozens of times in the D.C. area across Fox News, CNN, MSNBC and CNBC on Thursday and Friday, rotating which ads are shown on each of the networks every hour. The ads are part of its $1 million campaign pushing for a fair impeachment trial.

One of the ads pushes for the Senate to call President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE’s personal lawyer Rudy Giuliani Rudy GiulianiDemocrats fear Russia interference could spoil bid to retake Senate Grand jury adds additional counts against Giuliani associates Lev Parnas and and Igor Fruman Juan Williams: Breaking down the debates MORE, acting chief of staff Mick Mulvaney Mick MulvaneyMick Mulvaney to start hedge fund Fauci says positive White House task force reports don't always match what he hears on the ground Bottom line MORE, Secretary of State Mike Pompeo Michael (Mike) Richard PompeoUS reimposes UN sanctions on Iran amid increasing tensions Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Trump steps up Iran fight in final election stretch MORE and former national security adviser John Bolton John BoltonDiplomacy with China is good for America The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Pence lauds Harris as 'experienced debater'; Trump, Biden diverge over debate prep DOJ launches probe into Bolton book for possible classified information disclosures MORE to testify, instructing viewers to call their senators.

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The other two focus exclusively on Bolton, with one saying, “He’s willing to do his duty to tell the truth. Are Senate Republicans willing to do their duty to listen?”

The group is also promoting these ads on digital platforms in its “target states” Arkansas, Utah, Arizona, Colorado, Maine, Tennessee and Washington, D.C.

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Digital billboards will also appear online in these states through Sunday.

Republicans for the Rule of Law spokesman Chris Truax said in a press release that the group has been pressuring the Senate to hold a fair trial with witnesses, saying “America deserves to see all the evidence.”

“Now it’s decision time and Senate Republicans will come face-to-face with their constitutional responsibilities this Friday when they vote on calling witnesses,” Truax said. “They can honor their oath to do impartial justice and vote for transparency and openness. Or they can shove their fingers in their ears and try to hide the facts from both themselves and their constituents.”

The Senate is expected to vote on Friday on whether to permit witnesses in the trial.

Updated: 5:54 p.m.