The historic preliminary agreement with Iran to terminate its ability to manufacture nuclear bombs could be President Obama's greatest achievement eclipsing his rescuing of the US economy from the throes of the Great Recession and the passage of Obamacare. Of course it all hinges on the next step to get the fine print into shape.
Sadly the GOP led Congress along with their presidential candidates seem intent on derailing the agreement by imposing more sanctions on Iran aided by Israel's PM, Benjamin Netanyahu using the bully pulpit in a Joint Session of Congress thanks to Speaker Boehner to voice his opposition. This reminds one of President Woodrow Wilson's failure to get the US Congress to pass the League of Nations treaty after WW I. That inevitably led us into WW II.
It would be the highest tragedy if history were to be repeated by such ideological blindness. Does anyone really want a nuclear armed Iran in a region with other nations with nukes - China, Pakistan, India and Israel? The folly of such thinking would risk the highest tragedy imaginable in the Middle East and South Asia. And once this genie is uncorked the world will not be able to put the cork back in the bottle.
It would make one nostalgic for the Cold War era of mutually assured destruction. We would be in a multi-polar nuclear world worse than imagined by the movie Dr. Strangelove.