Once again, the US Constitution will stand in their way.
It's not the Constitution they fear.
When all is said and done, the Constitution is no more and no less than a restraining order: just a piece of paper.
What keeps them circumspect about their true political goals (imposition of Communism, granting and denying of rights at the whim of whatever political overlord they'd put in charge) are the 80 million of us out here in flyover country with 300 million guns and 6 trillion rounds of ammunition.