[Rome2000]

There is nothing in the Constitution that limits the number of judges to 9.

A Right wing POTUS could add six members if he had the stones.

Chavez made short work of a PITA Supreme Court in Venezuela, don’t think it can’t happen here.

[Dilbert San Diego]

Theoretically the size of the Supreme Court can be increased, but realistically, I think it would be a political molotov cocktail if either party tried to do this.

[Mariner]

"A Right wing POTUS could add six members if he had the stones"

That's politically untenable.

Just ask Roosevelt.