Earlier U.S. law enforcement raids on lawyers' communications?

Question

The office of the personal lawyer of the U.S. President has been raided by the FBI. I couldn't think of another time investigators raided an attorney's office, so I tried a few searches without any success. NPR said a by-the-books law enforcement raid on an attorney's communications and records was "rare but not unheard of". Until the present case, what was the most significant or consequent of these actions in the United States?

Answer 1

Richard Scruggs, 2008, plead guilty to conspiracy to bribe and influence 2 judges. He was disbarred and went to prison, released in 2014.

Scruggs was famous for his lawsuits on asbestos and tobacco. The FBI raided Scurggs' lawyer's office, with a search warrant.

But it's on the edge of violating attorney client privilege. And if it is later found to be an illegal search or seizure, the evidence found, no matter how incriminating, is inadmissible.

It may be even touchier to raid the office of the personal attorney of a US president.

Usually some whistle blower is the basis of probable cause required for the search warrant.