Iran...?

[Mr. Morden]

As for Bush and Cheney although they may like to attack Iran the US military is stretched too thin for them to do so without invoking a draft which would cause massive protests across the country and would be the final nail in the GOP's presidential coffin.

No one is talking about a ground invasion though.  If anything, there will just be airstrikes.  (Granted, Iran could retaliate against US troops in Iraq and Afghanistan, so I suppose things could ultimately escalate out of control.)