Ted Cruz doesn’t want special counsel Robert Mueller to go on a “fishing expedition” in his search for answers relating to Donald J. Trump’s relationship with Russian government officials.

I now shall remind the junior U.S. Republican senator from Texas about another fishing expedition that once suited GOP members of Congress just fine. It involved Kenneth Starr’s probe into an Arkansas real estate matter; they called it Whitewater.

Starr, the special counsel appointed to look into that deal, then went on a fishing expedition of his own. He wandered far afield and then discovered that President Bill Clinton was involved in a tawdry relationship with a young White House intern.

A federal grand jury summoned the president to talk about that relationship. The president didn’t tell the panel the truth.

Boom! Congressional Republicans then had their grounds for impeaching the president. The House did it. The Senate then acquitted him.

So, you see? Fishing expeditions can turn into something consequential.

Mueller is a pro and deserves latitude in his search for the truth.

I just find it laughable that Cruz would issue a warning against Mueller, a former FBI director and a man fairly universally respected as a thorough and meticulous investigator. Indeed, Cruz called Mueller a “good and honorable man.”

One can imagine if a Democratic president faced the kind of scrutiny that is being leveled against Donald Trump. What do you suppose the Cruz Missile would say then?

I get how political consideration — and leanings — are driving the analyses of the Mueller investigation.

My own take on Robert Mueller’s probe is that if he uncovers something that is, um, illegal, he is bound by his oath to pursue it to the very end.