Sometimes people want something so badly that they are willing to sacrifice anything to get it. That's what has happened to President Obama. He wants a nuclear deal with Iran so badly that he is willing to give them everything they asked for, while America gets nothing in return.
In 1994, Bill Clinton did the same thing with North Korea. He made an agreement with that country that allowed North Korea to obtain nuclear weapons. The only difference between the agreement with North Korea and the agreement with Iran, is that Iran has promised to destroy not only Israel, but also America. It seems that Obama is willing to risk the demise of our country to insure his foreign policy legacy.