Garry Kasparov: Negative impact. I think we are now facing disaster beyond belief. Obama should understand that normalization of relations with any country means a two-way street. And now we can see it in only one way. The deal with Iran, we hear two opposite stories. And not just about little things here or there; not commas and a couple letters.

You know, the fundamental differences in most of the substantial points in the deal. Then he shakes hands with Raul Castro. Shaking hands with a dictator, you know a hand covered in blood. You have to get something in exchange. There are still hundreds and hundreds of political prisoners in Cuba. It seems Obama wants his PR opportunities and he’s furiously defending his policy attacking GOP, attacking… while offering an olive branch to those who are attacking the values of the free world around the globe.