The Legislative powers of the U.S. president are as follows :
The president can veto any bill passed by Congress and, unless two-thirds in each house vote to override the veto, the bill does not become law.
When signing a bill the president can also issue a signing statement that expresses his opinion on the constitutionality of a bill’s provisions that intrude on executive power. He may even declare them unenforceable.
The president may propose a legislation, he or she believes is necessary. If Congress should adjourn without acting on those proposals, the president has the power to call it into special session.