Actually, presidents do not make the laws. Only congress can make the laws. Presidents will promote or push their priorities and try to encourage congress to turn those priorities into laws. Presidents need to work closely with congress, since no bills will pass unless congress agrees to pass them, no matter how much a president might want something done.
Presidents don't have legislative power. Congress has legislative powers. Presidents don't make laws.
In the USA, the President cannot make Laws. He can suggest them to the Congress, but all Law originates in the Congress, and is then passed on to the President for Ratification or Veto.
The Congress' main duty is to make and pass laws.
Federal laws
Congress
The purpose of Congress is to make laws.
Congress has the duty and the right to make the laws on trading. Congress was specifically granted the power over interstate commerce.
laws
Laws
A president cannot make laws. Only congress can do that. A president can sign something into law, or he can veto it. All presidents, including President Obama, have certain priorities and they hope congress will turn those priorities into laws, but it doesn't always happen the way a president might want it to.
To pass laws.
== == The Congress. Art. I, sec 1 of the Constitution.