Yes, yes, everyone to the left of FDR is a brainless anti-science rube because some Republicans are creationists. But how much must it suck to be a writer for the left-wing rag “Slate” and have to write this article:

Who Said It: Marco Rubio or Barack Obama?

Where we find that Candidate Obama said in 2008:

What I’ve said to them is that I believe that God created the universe and that the six days in the Bible may not be six days as we understand it [NOTE: “may not be” means “it might be,” for anyone who thinks that Obama is scientifically certain]… it may not be 24-hour days, and that’s what I believe. I know there’s always a debate between those who read the Bible literally and those who don’t, and I think it’s a legitimate debate within the Christian community of which I’m a part. My belief is that the story that the Bible tells about God creating this magnificent Earth on which we live—that is essentially true, that is fundamentally true. Now, whether it happened exactly as we might understand it reading the text of the Bible: That, I don’t presume to know.

Ooops.

Oodles of weasel-words there, but the basic upshot is that his position may be fundamentally no different from your standard Young Earth Creationist, he’s just less willing to come out and say it plainly.