- Advised President Bill Clinton during his impeachment process.
- Represented Hillary Clinton during her e-mail controversy.
- Represented Vice President Dick Cheney in the civil lawsuit, Wilson v. Cheney, filed by outed covert CIA operative, Valerie Plame.
- Served as Special Counsel in the George W. Bush Administration.
- Although declined a position in the Trump Administration, met with Donald Trump to discuss the possibility of impeachment as a result of the Special Counsel investigation which is looking into Russian interference in the 2016 United States elections.