The left does belive the Constitution is obsolete, evil and really, really bad.
...until they can use some obscure interpretation of it to hamstring a conservative policy.
Which is why it is actually a dead document. If one group pledges fidelity to it and the other group only uses it as a weapon to gain power, it is no longer a force to anchor the nation in the founding principals. It has become a force for the destruction of those principals.
It is time to make the Left and the DemocRAT Party obsolete!