Country singer Johnny Russell once said if he were president, he would promote peace by bringing all the world leaders together for a big old barbecue. President Obama tried to buy into that down-home wisdom but was rebuffed. Heedless of the bloody crackdown on the democracy movement in Iran, the administration invited Iranian diplomats to a July 4 barbecue at the White House as a gesture of outreach. The Iranians mocked the invitations, and they were withdrawn in a huff.