Congress confirms the VP nominated by the president with a majority vote
Both houses must approve a bill before it becomes law. Once approved the bill is sent to the president where it will be signed, vetoed, sent back for review, or 'left on the president's desk'
Congress decides whether to amend or abandon a bill, or override the president's veto. The veto can be overridden by a two-thirds majority in each house
Both houses must vote for a declaration of war, though it has not been used since WW2. Modern presidents avoid asking Congress for a formal declaration of war - the president's power to wage war is limited without the Power of the Purse
