The second debate between the Democratic candidates for mayor of Albany is being held now at the Times Union's Hearst Media Center. First-term Mayor Kathy Sheehan, Common Council President Carolyn McLaughlin and Common Councilmember Frank Commisso Jr. are debating tonight. The debate is moderated by the Times Union's Casey Seiler, with questions from Times Union editorial page editor Jay Jochnowitz, WTEN anchor Elisa Streeter and WAMC News director Ian Pickus.