President Obama concludes a meeting with Saudi King Salman at the G20 summit at the Regnum Carya Resort in Antalya, Turkey on November 15, 2015 (Credit: Reuters/Jonathan Ernst) WASHINGTON — Congress voted overwhelmingly Wednesday to allow families of Sept. 11 victims to sue Saudi Arabia for its alleged backing of the attackers, handing Barack Obama the first veto override of his presidency. Both the House and Senate voted decisively to reverse Obama’s decision to scuttle the legislation.