Colin A. Young State House News Service The panel that has been searching for a new director for the Office of Campaign and Political Finance was unanimous Friday in its selection of Woburn City Clerk William Campbell to lead the independent agency that has oversight of the changing world of political campaigns. The search committee -- Secretary of State William Galvin, Democratic Party Chairman Gus Bickford, Republican Party Chairman Jim Lyons and Boston College Law School Dean Vincent Rougeau -- interviewed four finalists this month and met via Zoom on Friday to share their thoughts and select their choice for the next OCPF head.