washington two senior u.s. senators say wednesday want amend law allow lawsuits saudi arabia sept. 11 attack narrow scope possible lawsuits lindsey graham john mccain two republican party congressional foreign policy leaders say would introduce amendment law government could sue knowingly engage terrorist organization say ally unite state sue unite state act terrorism unless knowingly involve apply us country graham say senate speech september senate house representatives overwhelmingly reject president barack obama veto justice sponsor terrorism act know jasta make u.s. law however lawmakers say almost soon want scope legislation narrow ease concern potential effect americans abroad one reason obama veto measure law grant exception legal principle sovereign immunity case terrorism u.s. soil clear way lawsuits seek damage saudi government riyadh deny longstanding suspicions back hijackers attack unite state 2001. however immediately clear whether graham mccain proposal would go anywhere group sept. 11 families lobby intensely bill strong support congress immediately object suggestion would weaken law senior senators want amend saudi september 11 law