So make them do it. It will be their last term in Congress.
They are not freaked out. They are trying to build public support in advance of a court challenge of the NE declaration.
Hardly, he's saying the NE declaration should be reviewed quickly by the courts so that POTUS can be LIMITED in what he can do, not so he can do something about the problem.
He will insert a signing statement, something like "Articles 2, 7, 8, 17, and 23 hereof will be interpreted to take effect only insofar as they do not interfere with the President's National Security obligations."