How long can the U.S. ignore Iran?

US Army: Hezb'allah trains Iraqi gunmen in Iran
Iran called off the next round of Iraq security talks with the United States until it stops a crackdown on Shi'ite gunmen even as the US military on Monday escalated its accusations of Iranian meddling in Iraq, saying detainees have described being trained by Hizbullah in camps outside Tehran.

My only question: "Before the U.S. election, or after (or during Israel's 60th anniversary celebrations)?"