The only way that Congress can give that power to the President is through the passing of a Constitutional Amendment. In his 1996 majority opinion, Stevens concurred:
Clinton V. New York City on Line item Veto
WRONG! The way they give power over to the President is by DOING NOTHING to stop him. You think they are abiding by laws that you site??
To give dictatorial power to Obama all they have to do is fail to do their jobs. Look at what’s happening in Libya. He didn’t get Congress approval, but he goes on as if it’s nothing. They continue to fund the operations so they in fact has given that power to Obama to declare war without their approval. Obama just does whatever he wants and Congress lets him do it.