To amend the constitution.

But the powers delegated were written in general terms for a reason: so that Congress (and the government generally) could use those powers as needed with the changing times.

The National Guard isn't unconstitutional because it's formed, organized, and regulated differently than the militias of the 1790s.

“Nobody has a legitimate reason to fear a faithful interpretation of the Constitution, and nobody has any legitimate reason to fear effective and complete protection of civil rights." - Alan Gura