Why on earth should Bush be worried about the minimal risk of being impeached? He's off anyway in a few months. I doubt if he's too worried about the pension implications if he had to leave early.

The thing to hold on to all this, and it keeps getting lost, is that there is no credible evidence that Iran is developing nuclear weapons. There is evidence that it could be doing so, but then that applies to a lot of countries.

There has been no offer of a deal under which, if Iran credibly guarantees not to develop nuclear weapons then the USA (etc) pledges itself not to attack Iran, and promises to treat any attack on Iran by a third party as a hostile act.

It seems to me that the failure to offer such a deal is an indication, on the one hand that there is not any genuine imminent prospect of an Iranian bomb, and on the other hand that there is an intention to provoke Iran into deciding to take the nuclear weapons road. The object being to provide justification for an attack on Iran.

I think it seems likely that some deal along those lines has in fact now been provided to North Korea, and has succeeded.