From the International Herald Tribune:

In an hour-long interview on Wednesday, Obama made clear that forging a new relationship with Iran would be a major element of a broad effort to stabilize Iraq. And he vowed to engage in “aggressive personal diplomacy” with Iran and other regional powers as he withdrew American combat forces in Iraq.

Obama said that Iran had been “acting irresponsibly” by supporting Shiite militant groups in Iraq. He also stressed that Tehran’s suspected nuclear weapons program and its support for “terrorist activities” were serious concerns and that “we expect them to desist from those actions.”

But Obama said that “changes in behavior” by Iran should be met with gestures by the United States, beginning with possible membership in the World Trade Organization.

If I were President Bush, Clinton, McCain, Giuliani or Romney I would immediately pickup on the “acting irresponsibly” definition of Iran supplying weapons to people that kill American troops.