President Barack Obama declared in his State of the Union address that the U.S. has a major opportunity to bring manufacturing back and fight unemployment. "Tonight, my message to business leaders is simple: Ask yourselves what you can do to bring jobs back to your country, and your country will do everything we can to help you succeed," he thundered. But as Shikha Dalmia writes, all one can say to that is, "Good luck." Maybe Obama can also spin gold from hay and pay off the national debt. The truth is that the president's economics simply don't add up.