'I am with you," President Obama said Sunday in his now-annual address for Nowruz, the Persian New Year. This time, however, he sidestepped the ruling ayatollahs he once tried to lure into "engagement" and instead urged "the young people of Iran" to imitate others in the region and rise up against their oppressors. Better late than never? Obama must realize that he's now in the regime-change business. Yes, that same enterprise he has dismissed so cavalierly since becoming a US senator. Deferring to the United Nations as he launched a Libya airstrike over the weekend only obscured his flip. Yes,...