A Republican group defended special counsel Robert MuellerRobert Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe MORE against attacks by President TrumpDonald John TrumpReporters defend CNN's Acosta after White House says he 'disrespected' Trump with question Security costs of Trump visit to Scotland sparks outrage among Scottish citizens Ex-CIA officer: Prosecution of Russians indicted for DNC hack 'ain't ever going to happen' 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 McConnellKavanaugh gets questionnaires for confirmation hearing Dem infighting erupts over Supreme Court pick Franken offers Dems a line of questioning for Kavanaugh's 'weirdly specific bit of bulls---' MORE (R-Ky.) and House Speaker Paul RyanPaul Davis RyanFive GOP lawmakers mulling bid to lead conservative caucus On The Money — Sponsored by Prudential — Trump walks back criticism of UK Brexit strategy | McConnell worries US in 'early stages' of trade war | US trade deficit with China hits new record Tampons sent to Dem who called for free feminine hygiene products in House 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 Jay RosensteinKavanaugh paper chase heats up 5 revelations from Mueller's indictment of Russians in DNC hack Mueller indictment appears to make reference to Roger Stone 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 SchumerCharles (Chuck) Ellis SchumerRed-state Dem tells Schumer to 'kiss my you know what' on Supreme Court vote Dem infighting erupts over Supreme Court pick Trump's latest win: More Americans are saying, 'I quit!' MORE (D-N.Y.) said Tuesday afternoon that Trump firing Rosenstein would spark a "constitutional crisis."