<answer>Congress</answer> has the sole power to legislate for the United States. Under the nondelegation doctrine, <answer>Congress</answer> may not delegate its lawmaking responsibilities to any other agency. In this vein, the Supreme Court held in the 1998 case Clinton v. City of New York that <answer>Congress</answer> could not delegate a "line-item veto" to the President, by powers vested in the government by the Constitution.
What is the only branch of U.S. government imbued with lawmaking abilities?
Congress