washington president barack obama friday veto legislation allow families victims sept. 11 attack sue saudi arabia could prompt congress overturn decision rare veto override first presidency obama say justice sponsor terrorism act would hurt u.s. national security harm important alliances shift crucial terrorism-related issue policy officials hand court bill pass senate house representatives reaction long-running suspicions deny saudi arabia hijackers four u.s. jetliners attack unite state 2001 back saudi government fifteen 19 hijackers saudi nationals obama say countries could use law know jasta excuse sue u.s. diplomats members military company even action foreign organizations receive u.s. aid equipment train remove sovereign immunity u.s. court foreign governments designate state sponsor terrorism base solely allegations foreign governments action abroad connection terrorism-related injuries u.s. soil threaten undermine longstanding principles protect unite state force personnel obama say statement senator chuck schumer co-wrote legislation champion immediately make clear difficult obama sustain veto schumer democrat senate issue statement within moments receive veto promise would swiftly soundly overturn represent new york home sept. 11 victims democratic republican candidates president hillary clinton donald trump say would sign bill law white house two-thirds lawmakers senate house vote override law would stand first override since become president 2009 possibly last obama leave office january friday veto twelfth presidency override expect despite lawmakers say doubt measure letter see reuters friday republican representative mac thornberry chairman powerful house arm service committee say would oppose override primary concern bill increase risk pose american military intelligence personnel diplomats others serve country around world thornberry write letter encourage fellow republicans sustain veto house speaker paul ryan say wednesday think enough vote override veto concern worry trial lawyers try get rich worry precedent tell reporters 9/11 families survivors unite justice terrorism group press congress uphold legislation call obama veto explanation unconvincing unsupportable saudi government lobby heavily stop bill european union formally oppose gulf state condemn major u.s. corporations general electric dow chemical also press lawmakers reconsider bill balance set dangerous precedent real potential destabilize vital bilateral relationships global economy ge chief executive jeffrey immelt say letter senate majority leader mitch mcconnell support bill obama veto sept. 11 saudi bill set showdown congress