What legislative powers does the president have?

All bills passed by Congress are sent to the president and if he signs them, they become law. If he disapproves of a bill, he sends it back to Congress and it does not become law unless they pass it again with a 2/3 majority. (If the president simply ignores the bill, it become law without his signature in ten days unless Congress adjourns during those ten days, in which case, it dies and does not become law.)