They're both happy we're in Iraq
That's one possible answer to the question, "What do Republicans and Iran have in common?" Their reasoning, however, is a little different:
"America is extremely vulnerable right now," said Akbar Alami, a member of the Iran's Parliament often critical of the government but on this point hewing to the government line. "If the U.S. takes any unwise action" to punish Iran for pursuing its nuclear program, he said, "certainly the U.S. and other countries will share the harm."
Iranians know that American forces, now stretched thin, are unlikely to invade Iran. And if the United States or Europe were to try a small-scale, targeted attack, the proximity of American forces makes them potential targets for retaliation. Iranians also know the fighting in Iraq has helped raise oil prices, and any attempt to impose sanctions could push prices higher.
In addition, the Iranians have longstanding ties to influential Shiite religious leaders in Iraq, and at least one recently promised that his militia would make real trouble for the Americans if they moved militarily against Iran.
All of those calculations have reduced Iranian fears of going ahead with their nuclear program  a prospect that frightens not just the United States, Europe and Israel, but many of the Sunni Muslim-dominated nations in the region, including Kuwait, Saudi Arabia and Egypt.
I've pointed out before that by our actions and lack of planning in Iraq, we gave Iran a golden opportunity to continue their push for nuclear weapons. It's disappointing, but unsurprising, to hear it from the other side as well.