A Republican group defended special counsel Robert MuellerRobert (Bob) MuellerSenate Democrats urge Garland not to fight court order to release Trump obstruction memo Why a special counsel is guaranteed if Biden chooses Yates, Cuomo or Jones as AG Barr taps attorney investigating Russia probe origins as special counsel MORE against attacks by President TrumpDonald TrumpRealClearPolitics reporter says Freedom Caucus shows how much GOP changed under Trump Jake Ellzey defeats Trump-backed candidate in Texas House runoff DOJ declines to back Mo Brooks's defense against Swalwell's Capitol riot lawsuit MORE in an ad that aired Wednesday morning during “Fox & Friends” — a show that Trump is said to frequently watch.

The 30-second ad from Republicans for the Rule of Law highlights Mueller’s military service in Vietnam and his service as head of the FBI during the Bush administration.

“Mueller has been trusted by Republicans to put America first,” the ad says.

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It also shows congressional leaders Sen. Mitch McConnellAddison (Mitch) Mitchell McConnellHouse to resume mask mandate after new CDC guidance Five takeaways from a bracing day of Jan. 6 testimony McCarthy, McConnell say they didn't watch Jan. 6 hearing MORE (R-Ky.) and House Speaker Paul RyanPaul Davis RyanRealClearPolitics reporter says Freedom Caucus shows how much GOP changed under Trump Juan Williams: Biden's child tax credit is a game-changer Trump clash ahead: Ron DeSantis positions himself as GOP's future in a direct-mail piece MORE (R-Wis.) supporting the probe into Russian interference in the 2016 presidential election.

“I have a lot of confidence in Bob Mueller,” McConnell says in the ad.

McConnell has said he believes Mueller should not be fired but said Tuesday he doesn’t think the Senate needs to pass legislation to protect the special counsel.

The ad also shows Vice President Pence saying “the special counsel has a job to do.”

It urges viewers to call their representatives and demand they protect the Mueller investigation.

Republicans for Rule of Law was founded by conservative commentator Bill Kristol and GOP members who don’t want to see Mueller fired during his Russia investigation.

Kristol tweeted about the ad on Monday night, taking a dig at Trump’s television habits by airing the spot during the Fox News show the president reportedly watches.

“You (and President Trump) can see our first TV ad--defending the Mueller investigation--on Fox and Friends in DC tomorrow morning.”

Reports broke on Tuesday that Trump had tried to fire Mueller in December after inaccurate claims that Mueller subpoenaed Deutsche Bank for Trump’s finances.

The White House said Tuesday that Trump “certainly believes” he has the power to fire Mueller after the FBI raided the office and home of his personal attorney, Michael Cohen.

However, legal experts say the authority falls on the Department of Justice official in charge of the probe, Deputy Attorney General Rod RosensteinRod RosensteinWashington still needs more transparency House Judiciary to probe DOJ's seizure of data from lawmakers, journalists The Hill's Morning Report - Biden-Putin meeting to dominate the week MORE.

Trump is reportedly mulling firing Rosenstein over the raid since the deputy attorney general personally signed off on the paperwork approving it.

Republicans and Democrats have united in their support of Mueller and urged the president not to fire Rosenstein.

Sen. Charles SchumerChuck Schumer84 mayors call for immigration to be included in reconciliation Senate infrastructure talks on shaky grounds Could Andrew Cuomo — despite scandals — be re-elected because of Trump? MORE (D-N.Y.) said Tuesday afternoon that Trump firing Rosenstein would spark a "constitutional crisis."