The tentative deal has brought out the hawks on both sides. However, it looks like it's only the ones in the U.S. who have a chance to derail this deal. I don't always agree with Obama, but he did pose a good question:
"When you hear the inevitable critics of the deal sound off, ask them a simple question: Do you really think that this verifiable deal, if fully implemented, backed by the world's major powers, is a worse option than the risk of another war in the Middle East?" Obama said.
"Is it worse than doing what we've done for almost two decades with Iran moving forward with its nuclear program and without robust inspections?"
Link: http://www.cnn.com/2015/04/02/politics/iran-nuclear-deal-obama-legacy/