SCOOP: Two sources close to the Senate probe tell @CBSNews that FBI agent Joe Pientka has been interviewed behind closed doors for "multiple hours" by investigators with Senate Judiciary + Senate Oversight/Governmental Affairs. In 2018, then-Chairman @ChuckGrassley first sought

Pientka's testimony but the request was denied until now. WHY IT MATTERS: Pientka is at the intersection of key events in the #Durham investigation. Along with agent Peter Strzok, Pientka conducted the January 2017 WH interview of @GenFlynn

that led to his dismissal. More recently, declassified records showed Pientka + others used an August 2016 "defensive-briefing" to warn candidate Trump, Flynn + @GovChristie about national security threats to gather information on their line of questioning about Russia for the..

FBI probe known as Crossfire Hurricane. These events + decision making fall under Durham. @LindseyGrahamSC @SenRonJohnson @CBSNews https://twitter.com/cbs_herridge/status/1286407008808325120