The Wall Street Journal is confirming that Robert Mueller has a grand jury empaneled as part of his probe of alleged collusion between members of the Trump campaign and Russian agents… and anything else he wants.

Special Counsel Robert Mueller has impaneled a grand jury in Washington to investigate Russia’s interference in the 2016 elections, a sign that his inquiry is growing in intensity and entering a new phase, according to people familiar with the matter.

The grand jury, which began its work in recent weeks, is a sign that Mr. Mueller’s inquiry is ramping up and that it will likely continue for months. Mr. Mueller is investigating Russia’s efforts to influence the 2016 election and whether President Donald Trump’s campaign or associates colluded with the Kremlin as part of that effort.

This doesn’t mean any indictments are in sight but it does mean that the investigation is off and running:

“This is yet a further sign that there is a long-term, large-scale series of prosecutions being contemplated and being pursued by the special counsel,” said Stephen I. Vladeck, a law professor at the University of Texas. “If there was already a grand jury in Alexandria looking at Flynn, there would be no need to reinvent the wheel for the same guy. This suggests that the investigation is bigger and wider than Flynn, perhaps substantially so.”

Thomas Zeno, a federal prosecutor for 29 years before becoming a lawyer at the Squire Patton Boggs law firm, said the grand jury is “confirmation that this is a very vigorous investigation going on.”

“This doesn’t mean he is going to bring charges,” Mr. Zeno cautioned. “But it shows he is very serious. He wouldn’t do this if it were winding down.”

And this thread from Popehat. Note item #10

Someone is going to be prosecuted for something.

And a shoe falls