They can never answer the question of a president enforcing laws signed by previous administrations. If their definition of the "oath" is as they define it, a president that enforces the Brady Bill, the voting rights act and a host of bills that Republican Presidents have never failed to enforce but are on record as saying they are unconstitutional, then by their own definition they are also "traitors" including Ronal Reagan.
Taking the oath clause and trying to convert it into some kind of Constitutional duty to veto or refuse to enforce a law produces absurd results, which tells you the argument is flawed, which is why not a single S. Ct. has has even mentioned it. People are taking a policy dispute and trying to make a constitutional crisis out of it, which it ain't.
Texas hype. - Jackson was unchallenged in his refusal to obey a USSC order on removing the cherokee. -- And if Bush Sr. would have flat out refused to enforce Brady on constitutional grounds, -- he could have been a winner. -- Like father, like son. -- This Bush has lost his chance too.
"are on record as saying they are unconstitutional"
I'm assuming you have references for that?