Diplomacy: Barack Obama supports tough and direct diplomacy with Iran without preconditions. Now is the time to use the power of American diplomacy to pressure Iran to stop their illicit nuclear program, support for terrorism, and threats toward Israel. Obama and Biden will offer the Iranian regime a choice. If Iran abandons its nuclear program and support for terrorism, we will offer incentives like membership in the World Trade Organization, economic investments, and a move toward normal diplomatic relations. If Iran continues its troubling behavior, we will step up our economic pressure and political isolation. In carrying out this diplomacy, we will coordinate closely with our allies and proceed with careful preparation. Seeking this kind of comprehensive settlement with Iran is our best way to make progress.