The president’s team has developed a “Trump-hybrid model” building off those Clinton examples, said David Bossie, a former deputy Trump campaign manager who was also an investigator for House Republicans as they probed Clinton’s record.

“I have no doubt the president’s team has studied what Bill Clinton’s team did and is emulating what they believed worked,” said Bossie, who met with senior White House officials soon after Mueller’s appointment to share his Clinton-era experiences. “You always are going to make your own tweaks and adjustments for time and circumstance, but generally it’s the same approach at this point,” Bossie said.

Trump officials have also sought help from Democrats like Lanny Davis, a former Clinton White House legal adviser who spent countless hours defending Clinton on television in the late 1990s. Davis said he has spoken with Steve Bannon, the former White House senior strategist, and several other Trump associates and lawyers about his experience, answering questions like how attorneys and White House staff should interact with each other and where the line should be drawn for challenging the investigators.