If you doubted whether James Comey’s testimony in front of the U.S. Senate Intelligence Committee got anyone’s attention, a report in the Washington Post has provided your answer.

The Post has reported that Donald John Trump, the 45th president of the United States, is under investigation for “possible obstruction of justice.”

Who is doing the investigating? That would be special counsel Robert Mueller, appointed to his job by Deputy U.S. Attorney General Rod Rosenstein. Why the deputy AG? Because the attorney general, Jeff Sessions, recused himself from anything to do with the Russia matter that is swirling all around the president.

This is getting a bit, um, testy … don’t you think?

Trump fired Comey because of what he called “the Russia thing,” and after Comey reportedly told Trump that the president wasn’t personally under investigation by the FBI. At issue, in case you don’t know, is whether the Trump campaign colluded with Russian hackers who sought to influence the outcome of the 2016 presidential campaign.

We will need to hold on with both hands as this probe continues.

Mueller has enormous authority to proceed with this probe. There will be many traps to run, many leads to pursue, many tips to ferret out.

Many of us are wondering: Did the president ask Comey to shut down his probe of former national security adviser Michael Flynn’s relationship with Russian officials? And did that request constitute an obstruction of justice?

I should note, too, that Mueller also is a former FBI director, so the man has some serious investigative chops.

In the midst of all this are reports circulating that Trump considered firing Mueller, but was talked out of it by senior White House staffers.

Oh … brother. Let’s all hang on.