Last week in the Russia investigations: Will "infiltration" be the new "collusion" or "obstruction?" Another skirmish over executive privilege? Is the Russia imbroglio about the money-go-round? And will the shutdown disrupt Mueller's investigation?

How much did Russia "infiltrate" political organizations inside the United States as part of its attack on the 2016 presidential election?

That's one of the big unanswered questions to emerge from the transcript released Thursday of the House Intelligence Committee's interview with Glenn Simpson, founder of the political research shop Fusion GPS.

Simpson not only told lawmakers the Russians "infiltrated," in his phrase, the National Rifle Association, which has been the subject of reports before. (The NRA has not offered any comment on those accounts.) Simpson also said this:

"I would say broadly speaking, it appears that the Russian operation was designed to infiltrate conservative organizations. And they targeted various conservative organizations, religious and otherwise, and they seem to have made a very concerted effort to get in with the NRA."

The FBI is investigating that specific connection, as Peter Stone and Greg Gordon reported for McClatchy. The case involves a powerful Russian banker who may have given money to the NRA, which, in turn, spent at least $55 million on the 2016 elections. About $30 million of that supported Donald Trump's presidential bid.

So one question for investigators might be: Was there any foreign money involved? That isn't clear and Justice Department special counsel Robert Mueller talks publicly about as much as the Lincoln Memorial.

The strategy of "infiltration" or co-option is a classic, though; Russia's intelligence agencies recruited via the Communist Party of the United States back in the old days and also attached themselves to ostensibly pro-peace and minority rights movements.

The through-line from then to now is visible in some of the other comments Simpson made to lawmakers, including what he called Russian support for the California and Texas "independence movements," which appears to be all about simple irritation for the federal government. Moscow was irate about what it viewed as American meddling in its front yard — Ukraine — and wanted payback.

But the broader question Simpson broached has not been addressed: How broadly did Russia's campaign of "active measures" in 2016 integrate itself with national American political groups?

The big picture: Each new crumb of information adds to the total understanding of the Russian attack in 2016, which may be well understood inside the classified world, or by members of Congress, but which has never been detailed officially by the government for the public.

(In fact, the government is prosecuting a former National Security Agency contractor, Reality Winner, for allegedly leaking one of the few official documents to emerge about the attack.)

So people on the outside must do "intelligence analysis" of their own, "fusing" pieces of "OSINT" to form a "mosaic" based on congressional testimony, official reports and court documents. That's how we've formed the picture so far.

We know that Russian agents made personal overtures to Trump campaign workers. We know cyber-operatives hacked political operators and organizations and leaked what they stole; we also know a broad social media campaign amplified controversy and pitted U.S. political opponents against each other.

In that context, it certainly makes sense that Moscow might also have spent money as part of what the U.S. intelligence community calls its goal to help elect Trump — but the tidbits in the Simpson transcript are also a reminder about how much there could be that we still don't know about this story.

White House communications director Hope Hicks did not go to Capitol Hill on Friday to talk with the House Intelligence Committee about the Russia imbroglio.

She was supposed to have been its third guest of the week, following former Trump campaign heavies Steve Bannon and Corey Lewandowski, but administration officials called her back.

Nobody seems to know what's going on. The White House denies it has invoked executive privilege — the legal doctrine that allows an administration to shield its inner workings and conversations — but there have been all kinds of rumblings about it from Capitol Hill. Bannon also frustrated some members of Congress in what he was and wasn't willing to say, but there isn't much clarity about what and why.

One theory is the Trump administration is making soft invocations of the privilege — instructing or permitting witnesses essentially to say, "I won't answer because the White House reserves the right to invoke executive privilege, even though I don't have a lawyer letter in my hand formally doing so."

Another way the Trump White House may be testing precedent is by claiming that executive privilege shields things that took place during the transition period that followed Trump's election but before his inauguration. That, as NPR's Carrie Johnson reports, would be unusual.

Steve Bannon's synopsis to Michael Wolff about the Russia imbroglio has now become part of history: "You realize where this is going. This is all about money laundering."

A slew of new reports appears to strengthen that case. Jason Leopold and Anthony Cormier of BuzzFeed News write that were a mess of unusual payments to and from Sergey Kislyak, the former Russian ambassador to the U.S. who's a central figure in the Russia matter. Sundeep Kavanal Radesh quotes a German report in the IBTimes that says Deutsche Bank is passing evidence about questionable Trump money transfers to German regulators and Mueller's office.