Republicans in Congress and their friends in the media are now singing loudly from the same political hymnal.

They want special counsel Robert Mueller to either be fired or they want him to conclude his investigation into the “Russia thing.”

Oh, they have such short memories.

I feel compelled to remind them all of one word: Benghazi.

The GOP conducted an investigation with seemingly no end. It involved then-Secretary of State Hillary Clinton and whether she committed some sort of crime in relation to the attack on the U.S. consulate in Benghazi, Libya. The attack killed four Americans, including the nation’s ambassador to Libya.

They held hearings. They brought Clinton before congressional panels. They quizzed her, berated her, threatened to “lock her up!” over the chaos that ensued from that tragic event.

It went on for years. From 2012 until 2016. It cost millions of dollars of public funds.

Now we have Mueller on the hunt for the truth behind another highly sensitive matter: whether Donald Trump’s presidential campaign colluded with Russian government officials who sought to meddle in our 2016 presidential election.

They now are alleging bias in the Mueller team. They point to two staffers who exchange pro-Hillary email and text messages — before Mueller fired them when their antipathy toward Trump became known.

Some in the conservative media are pressuring the president to fire Mueller. Big mistake, folks! The president says there’s no evidence of collusion. Fine. Then, let Mueller’s team reach that conclusion on its own.

As for the calls for the special counsel to wrap up his probe, Republicans on Capitol Hill and around the country need to examine their own conduct during another probe involving a prominent Democratic politician.

If we’re going to demand a thorough probe into alleged wrongdoing, then it must apply to everyone.

Isn’t that only fair?