It’s not yet clear whether the former special counsel, Robert Mueller, will talk openly and publicly to Congress about that investigation he conducted into The Russia Thing.

I surely want him to take an oath to tell the truth and then answer questions from House and Senate committees about how he arrived at his findings. He determined that Trump and his 2016 presidential campaign did not conspire to collude with Russians who attacked our electoral system. To borrow a quote from Senate Majority Leader Mitch McConnell: Case closed.

The other question involves obstruction of justice.

Here’s where I believe Mueller’s testimony could be the Mother of Game Changers as it regards Donald Trump.

Someone on a pertinent committee is going to ask Mueller — a top-notch lawyer and a former FBI director — this question: Did the president of the United States break the law by obstructing justice in the investigation into the Russian interference?

Mueller has said he could not file a formal complaint against the president of the United States, following Department of Justice guidelines. He did not “clear” Trump of any crime. Mueller merely said he couldn’t indict Trump because he is the president.

But the question is out there: Did the POTUS break the law?

There well could be a game of rhetorical gymnastics as Mueller tries to dodge the question. It might take an equally nimble senator or House member to flush the answer out of Mueller.

However, he if says “yes, the president broke the law,” then I believe we well might have grounds to impeach POTUS.

However, and this remains a huge caveat: Would such an admission by Robert Mueller actually shake Senate Republicans loose from Trump’s political vise grip to put the president in jeopardy if an indictment finds its way to the Senate, where the president would stand trial?

My hope would be that it would. My fear is that GOP cowardice would remain too strong to toss aside.