Nellie Ohr will sit for an interview with Congress next week, according to Rep. John Ratcliffe (R-TX).

Ohr, an expert on Russia who speaks fluent Russian, is a central figure in the nexus between Fusion GPS - the opposition research firm paid by the Clinton campaign to produce the "Steele Dossier " - and the Obama Justice Department - where her husband, Bruce Ohr, was a senior official. Bruce was demoted twice after he was caught lying about his extensive involvement with Fusion's activities surrounding the 2016 US election.

Wow, Nellie Ohr, Bruce Ohr’s wife, is a Russia expert who is fluent in Russian. She worked for Fusion GPS where she was paid a lot. Collusion! Bruce was a boss at the Department of Justice and is, unbelievably, still there! — Donald J. Trump (@realDonaldTrump) August 30, 2018

Notably, the Ohrs had extensive contact with Christopher Steele, the ex-MI6 spy who authored the salacious anti-Trump dossier used to justify spying on the Trump campaign during the election, and later to smear Donald Trump right before he took office in 2017. According to emails turned over to Congress and reported in late August, the Ohrs would have breakfast with Steele on July 30 at the downtown D.C. Mayflower hotel - days after Steele had turned in several installments of the infamous dossier to the FBI. The breakfast took place one day before the FBI/DOJ launched operation "Crossfire Hurricane," the codename for the official counterintelligence investigation into the Trump campaign.

"Great to see you and Nellie this morning Bruce," Steele wrote shortly following their breakfast meeting. "Let’s keep in touch on the substantive issues/s (sic). Glenn is happy to speak to you on this if it would help," referring to Fusion GPS co-founder Glenn Simpson.

No stranger to the US intelligence community, Nellie Ohr represented the CIA's "Open Source Works" group in a 2010 "expert working group report on international organized crime" along with Bruce Ohr and Glenn Simpson.

Nellie Ohr, the wife of demoted DOJ official, Bruce Ohr, not only worked for Fusion GPS, but has also represented the CIA's "Open Source Works" group. https://t.co/u5HPgJwvWd pic.twitter.com/ZPhAIzR6wv — Josh Caplan (@joshdcaplan) December 12, 2017

Meanwhile, some have wondered if Nellie's late-life attraction to Ham radios was in fact a method of covertly communicating with others about the Trump-Russia investigation, in a way which wouldn't be surveilled by the NSA or other agencies.

was Nellie Ohr’s late-in-life foray into ham radio an effort to evade the Rogers-led NSA detecting her participation in compiling the Russian-sourced Steele dossier? Just as her husband’s omissions on his DOJ ethics forms raise an inference of improper motive, any competent prosecutor could use the circumstantial evidence of her taking up ham radio while digging for dirt on Trump to prove her consciousness of guilt and intention to conceal illegal activities. -The Federalist

In mid-August, President Trump called Bruce Ohr a disgrace - tweeting: "Will Bruce Ohr, whose family received big money for helping to create the phony, dirty and discredited Dossier, ever be fired from the Jeff Sessions “Justice” Department? A total joke!"

Will Bruce Ohr, whose family received big money for helping to create the phony, dirty and discredited Dossier, ever be fired from the Jeff Sessions “Justice” Department? A total joke! — Donald J. Trump (@realDonaldTrump) August 20, 2018

Needless to say, Congress will have no shortage of questions to ask Nellie.