Tom Clancy is the MAN.
Skybird also raises a good point. The Iranian Naval Forces, if this blockade does pass, will do nothing more than mine the strait.
Given that they already know about this, they're probably already preparing or are prepared to commence mine laying. I'd also imagine that the Russians are watching the situation very carefully to protect their oil investments.
However, I don't think this will pass. Blockading Iran would simply piss them off, and then they'd refuse to give us oil, and then oil prices would skyrocket to over $200 bucks a barrel.