Then-FBI Director James Comey announced on March 20 that the FBI was investigating possible collusion between the Trump campaign and Russian agents. On May 9, President Trump fired the FBI director, igniting an outcry that grew from just Democrats
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Cato’s Pilon said Mueller’s investigation would determine whether the facts in the investigation warranted prosecution. If they don’t, Pilon added, Mueller “will not be inclined to make his findings public, as with any other investigation of a criminal sort.”

Some worried that the multiple probes could create a problem much the way they did during the Ronald Reagan-era Iran-Contra investigation in the late 1980s. That affair involved the Reagan administration selling arms at high prices to Iran in exchange for Iran exerting its influence to help gain the release of American hostages held in Lebanon. The excess profits from the weapons, in turn, were diverted by the administration to help fund “Contras” who were fighting the Sandinista government in Nicaragua.

Congress was examining Iran-Contra at the same time that an appointed independent counsel, Lawrence Walsh, was investigating White House aides, including Col. Oliver North, in the arms-for-hostages deal. North was granted congressional immunity to testify, a move that ultimately hurt the court case against him. Convictions against the Reagan aide were later thrown out.

Sens. Jim Risch, R-Idaho, and Dianne Feinstein of California, the second-ranking Democrat on the Senate Intelligence Committee, doubt that the same thing will happen this time.

“You’re overthinking this,” Risch said when asked about any precedent.

“You’re dating yourself,” Feinstein added.

Lesley Clark and Curtis Tate contributed to this story.   

William Douglas: 202-383-6026, @williamgdouglas

Sean Cockerham: 202-383-6016, @seancockerham