When he can find a few $hundred million a month for US costs and half a million of his reserves to put on assault ships in the Gulf for months on end, he'll get his threat. One thing the Tea Party is avid about is that the cupboard is bare. And most of them know that all the US reserves have commitments elsewhere. Then again, the US Marines are recruiting.
Russia: U.S. plan to provide air cover for Syrian rebels undermines Damascus fight on ISIS (Reuters)
from the article: U.S.: Force is not the only way to stop a nuclear Iran