"Evolution" evidently means doing what is politically expedient at any given moment. Here is the very definition of not standing by your principles:
"In fact, Obama has not 'evolved'—he has changed his position whenever his political fortunes required him to do so. Running for the Illinois state senate from a trendy area of Chicago in 1996, he was for gay marriage. “I favor legalizing same-sex marriages,” he wrote in answer to a questionnaire back then. In 2004, he was running for the U.S. Senate and needed to appeal to voters statewide. So he evolved, and favored civil unions but opposed homosexual “marriage.” In 2008, running for president, he said, “I believe marriage is between a man and a woman. I am not in favor of gay marriage.” Now in 2012, facing a tough reelection campaign where he needs energized supporters of gay “marriage” ... he is for it. To paraphrase John Kerry's campaign, he was for it before he was against it before he was for it again."
Yet, POTUS still hasn't signed an executive order drafted by the gay community which seeks to end discrimination based on sexual orientation. Political expediency at its finest. A lesson we can teach all of our children- Stand by your principles unless you don't want to at that particular moment.