The White House meeting next Monday between President Obama and Israeli Prime Minister Benjamin Netanyahu could be the most critical encounter for the two men since they took office.
Netanyahu is expected to argue that time is running out on efforts to discourage Iran from developing a nuclear weapon. Obama may say the Israelis can count on U.S. support, but that they should give sanctions and diplomacy time to work before turning to military action.
After years of relatively ineffective sanctions on Iran, the United States and Europe have finally settled on a series of measures that really do seem to be working.
The latest came in legislation co-authored by Democratic Sen. Bob Menendez of New Jersey. At first he wasn't sure the Obama administration was really committed to a tough sanctions regime, but now he sounds convinced.
"Letting countries throughout the world know that we were serious about the enforcements of these sanctions has already cost Iran in terms of its economy, the value of its currency," he says.