Youngstown Sheet & Tube Co. v. Sawyer was a case that was heard in 1952, which related to whether or not the President of the U.S. has the right to seize private property without a legal reason.
The Supreme Court determined that the President did not have unlimited powers to seize private property.
This law held that there will always be the need for a legal reason, which is already predetermined in law, before the U.S. government or a president can seize private property.