A well-known conservative lobbyist was sprayed with a “caustic substance” by a masked attacker outside his Arlington home Tuesday, according to local police. Jack Burkman, who made headlines again in 2016 by offering a $130,000 reward for information on the mysterious murder of DNC staffer Seth Rich, was reportedly attacked Tuesday. Local police told The Washington Post they have not yet determined the perpetrator’s identity. Burkman told WaPo he was returning from the grocery store when a man wearing a ski mask jumped out of a black SUV, sprayed him in the face with what appeared to be pepper spray,...