1- why is the necessary and proper clause a source of ongoing debate? congress cannot agree on what the clause entails. the wording of the clause is often undergoing revision. the clause deals with powers that are ambiguous and misinterpreted. the clause establishes reserved rights, which vary from state to state. 2 - congress checks on the power of the presidency by overriding a presidential reversal or veto. debating the bill in both of the houses. making laws without presidential review. sending the bill back to several committees..