Thomas Hale Boggs Jr, the long-term chairman of legacy Patton Boggs, and most recently chairman emeritus of newly merged Squire Patton Boggs, has died unexpectedly at his Maryland home.

Boggs, 73, was one of Washington DC’s most influential lobbyists and public policy lawyers. He served as chairman of the executive committee of Patton Boggs, prior to its merger earlier this year with Squire Sanders.