Robert Mueller keeps getting more information than he can digest at a single sitting.

Yep, the special counsel assigned to examine Russian government meddling into our electoral process and allegations that the Donald J. Trump campaign colluded with the Russians is getting a good bit more, um, complicated.

The Washington Post is reporting, for instance, that the president told Donald John Trump Jr. how he should describe a meeting Don Jr. had with a Russian lawyer who invited him to meet so he could receive some alleged dirt on Hillary Rodham Clinton.

The president’s lawyer denies the story outright. Other Trump defenders accuse the Post of conveying “fake news.”

But, oh, this is the stuff of serious political intrigue.

Don Jr. supposedly reported the meeting was to be about “Russian adoption policy.” That wasn’t the case, according to the Post, which reports that young Don got instructions from Dad the President on what to say.

I believe that might constitute a serious obstruction of justice matter … if it’s true. The Post, of course, stands by its story, while the White House denies all of it.

Don Jr. isn’t talking. Imagine that.

Recall that another special counsel, Kenneth Starr, started looking into a real estate deal involving President and Mrs. Clinton. Then more tidbits began flying over his transom. Eventually, Starr got wind of a relationship Bill Clinton was having with a young White House intern. Starr poked around a little more and, well, the rest is history.

Mueller has the same latitude as Starr as he pursues the Russia matter. Stories such as the one published by the Post give him even more grist to pore through as he continues his pursuit of the truth behind the Russia story.