 Thus, the Constitutional principle of bicameralism and the separation of powers doctrine were disregarded in this case, and this legislative veto of executive decisions was struck down.In 1996, the United States Congress passed, and President Bill Clinton signed, the Line Item Veto Act of 1996.This act allowed the President to veto individual items of budgeted expenditures from appropriations bills instead of vetoing the entire bill and sending it back to Congress.