It appears that Mitt made a secret promise to sign the Employment Non-Discrimination Act to the Log Cabin Republicans:

Romney’s greatest asset as a politician is his total lack of integrity, honesty or consistency. He is perfectly willing to go before the religious right one day and pledge fealty to them, and the Log Cabin Republicans the next day to do the same. And, apparently, that is what he has done, in private. [ Log Cabin Republican executive director, R. Clarke] Cooper asserted repeatedly that, “With a President Romney we’re confident we can work with him [on ENDA].” But when asked why, Cooper offered only reasons that Romney should work with them: that discrimination is a form of economic inefficiency and impediment to job growth. But you could make the same argument to any president. The question is what Romney has said that gives them such confidence. Cooper says, “Romney been clear in his opposition to workplace discrimination.” He also seemed to conflate private conversations with LCR representatives and his public pronouncements, saying such things as, “[Romney] is acutely aware of the problem of the patchwork of discrimination,” meaning that it creates problems for businesses that some states ban anti-gay discrimination and others do not. Later, clearly referencing private communications with the campaign, Cooper said, “Based on our work with the campaign and Gov. Romney, I’m confident [that he will support anti-discrimination legislation].” Cooper was coy and vague about what exactly Romney said to inspire such confidence; he says Romney “has been adamant” in opposition to discrimination. Romney is clearly quite a salesman.

Mr. Cooper is either deluded or a complete idiot.