Charlie represents clients before Congress and the executive branch on a diverse set of policy matters, with an emphasis on automotive, congressional investigations, energy, environmental and international trade issues. Charlie also provides strategic counsel on major corporate transactions, as federal policy makers review their potential legal, regulatory and policy implications.

Active in Democratic politics throughout his career, Charlie has campaigned for candidates for the presidency, Senate and House of Representatives, and advised and recruited for election voter-protection operations. Charlie served as a law clerk on the Democratic staff of the House Judiciary Committee.