Close but not quite. The Constitution is the law of the land but whatever is doesn't cover is left to the States to decide. But no State can write a law the supersedes the Constitution.
"THAT" is what the Founders intended.
“But no State can write a law the supersedes the Constitution.”
Precisely the idea stated by the Virginia Supreme Court when striking down a city ordinance prevent open carry in the city of Norfolk. Virginia law allows open carry and the city cannot supercede the law of the state.