This is referred to as "Separation of Powers".
The Legislative Branch is given authority over one task, while the Executive Branch (or the president, in your case) is given authority over another.
separation of powers
separation of powers
The National Government ( Congress) has the responsibility.
The President is responsible for implementing and enforcing the laws written by Congress. He appoints the heads of the federal agencies, including the Cabinet, to help meet that responsibility.
Congress has the task of passing the laws and the President is charged with carrying them out and enforcing them. Congress appropriates the federal funds and the president spends them. Congress sets the taxes and the president collects them.
No- but he can ask somebody in Congress to introduce a bill for him .
The budget is the responsibility of Congress. The president can make proposals but Congress does not have to follow them them.
The President has the opportunity to establish an agenda for Congress by advocating for specific policies. Presidents also have the ability to use their position to take their case directly to the American people, which can impact public opinion, and consequently, impact Congress.
confine himself to enforcing laws passed by congress
No, he needs most of the rest of Congress to approve it first.
Only members of Congress con actively introduce bills.
The U.S. President cannot introduce a bill, but it is part of his/her job to suggest to Congress what bills are needed.