Will Congress declare war on ISIS?

Will Congress declare war on ISIS?:

"Seemingly arguing against simply a reauthorization of military force by Congress, many, like Long, are making it clear they are calling for a constitutional declaration of war – an action not invoked by Congress for 75 years.

“A formal declaration of war will give unequivocal direction to our elected government – to tell them we must stand and fight, to not cower,” Long wrote. “War is horrible. Appeasement, surrender and moral cowardice are acts worse than war. We must stand together and steel ourselves for what lies ahead.”