OK. You called it "attempted murder". Let's go with that. Suppose it gets signed. At that point, is the Republic dead? Suppose it doesn't get to the USSC before it takes effect. Is it dead then? Suppose (God forbid) the court upholds it. Is the United States of America dead then?
Hyperbole.
Once legislators create, and executives allow (or even promote) laws or acts that directly oppose, weaken, or dissolve the constitution. The Republic is threatened. But Freedom is always threatened in large and small ways.
However if the Supreme Court allows such acts and importantly, the People tolerate them, then yes. The Republic is dead and all that is left is what to do with the corpse.