The law was passed by a president of his own party, Bill Clinton a former constitutional law profession. It was passed with huge bipartisan majorities in *both* houses of the congress. It should be vigorously defended until judicial review is exhausted.
I agree wholeheartedly.
However, nothing compels a POTUS to defend any law or appeal an adverse ruling with this exception: "Support and Defend the Constitution" (as expanded by law is unspoken)
The ONLY RECOURSE is for the House to Impeach and the Senate Convict. Or, use funding as coercion.
Short of that any POTUS can act with impunity in any matter. It's ALWAYS BEEN THAT WAY AND THERE IS NOTHING NEW HERE.