Not Clinton-Obama but Obama-Clinton

I have always thought (and still think) that a Clinton-Obama ticket would be too exotic to be viable. But I made this judgment based on the assumption that Hillary Clinton will be the presidential candidate. This is not necessarily the case and, if not, Clinton-Obama may be an impossibility, but Obama-Clinton, on the other hand, may not. If Obama is the presidential candidate, then Hillary Clinton will seem like a reasonable, experienced balance to his novice status. Also, even though it would probably make her the oldest Democrat to run for president, should she choose to pursue the office in 2016, a vice-presidential candidacy would align her for the Oval Office in a way that returning to the Senate would not do, if Obama should win the election.