Haaretz reported the time frame for Iranian nuclear negotiations is October. Dennis Ross, President Obama's Special Envoy to the Persian Gulf, delivered the message. Ross is a necon. Their preference for violence is well established.
The challenge for Iran is negotiating during and after an election season. The new President may not be installed until early August. That leaves precious time for a new leader to install staff, much less start and finish negotiations with the U.S. in six weeks or less.
Should Iran chose a reformer, the time frame isn't credible.