So, after taking the oath of office for a record fourth time in four years (and did you note he stumbled on his job title?) it would now appear churlish to suggest that this is anything other than the Age of Obama.
One-term presidents get mentions in history books; two term administrations warrant a chapter. So it will now be with Barack Obama. The Republicans may have sought to make him a one-term president, but if the best competition they could muster was Mitt Romney and a deeply divided party, then one must speculate as to how serious they were about this ambition.