If a joint resolution is passed by Congress can it be vetoed by POTUS?
If so, must the Congress override his veto in order to make this joint resolution law?
If so, what are the odds of the House and the Senate overriding the President's veto?
Unlikely I would say.
Therefore, it appears the Joint Resolution will never overturn the President's National Emergency.
http://uscode.house.gov/view.xhtml?path=/prelim@title50/chapter34&edition=prelim