The (Ex) Washington Realist

Have Brazil and Turkey reached a deal with Iran over nuclear enrichment? As expected, Iran has accepted in principle, and as we've seen in the past, acceptance in principle often leads to delays in terms of implementation. But if Russia and China accept that this is significant progress in terms of advancing diplomatic efforts, does it slow down the adoption of a new sanctions resolution at the UN--and in turn accelerate Congress's efforts to reconcile the stalled sanctions legislation awaiting reconciliation?