Yes the vote Congress takes to declare war on IS should have a declaration to stop All immigration temporarily and close down our border via military immediately! Watch how fast he would veto it.
Oh who am I kidding. Republicans love that cheap labor, what are a few Americans dead here or there.
In fact, in 1941, the Congress DIRECTED President Roosevelt to wage war on Japan:
"...the President is hereby authorized and directed to employ the entire naval and military forces of the United States and the resources of the Government to carry on war against the Imperial Government of Japan..."