On Tuesday, Obama, the Illinois senator and Democratic presidential candidate, told Gen. David Petraeus and Amb. Ryan Crocker, the top U.S. military and diplomatic leaders in Iraq, that talks with Tehran are critical to U.S. and Iraqi success. “Nobody’s asking for a precipitous withdrawal, but I do think that it has to be a measured but increased pressure; and a diplomatic surge that includes Iran. Because if (Prime Minister Nouri al-) Maliki can tolerate as normal neighbor-to-neighbor relations in Iran, then we should be talking to them as well. I do not believe we’re going to be able to stabilize...