A few months ago, I wrote that Obama had an aura of invincibility around him. But I regretted writing those words, because a year is a very long time in national politics.Yet he won last in Iowa last night, and I found myself amazed, delighted, and heartened that maybe, just maybe, this country was ready to elect an African-American President.In some ways, both Huckabee and Obama represent the essence of what their parties stand for. Huckabee represents allegiance to the evangelical base (with no knowledge of international affairs -- as my husband Scott writes in his blog wordyard.com --"that worked so well last time!") Obama represents renewals and change.I do not underestimate Hillari Clinton. She's a formidable adversary. But I'm putting my money on Obama getting the nomination.