Because if he’s lucky enough to win, the people will be glad when he is gone.
Like most stable countries with functioning economies, America’s best and brightest rarely go into politics.
So, a typical politician.
The Obama Cult is kind of creepy, but as he’s already begun the process of screwing over supporters as he concentrates on what he believes is really important, it will fade. Clinton was all things to all people, until his union and environmental supporters realized he really cared about the global trading regime. Bush reached even higher popularity, but it turns out that developing counter-insurgency capacity is a long hard slog.
If your goal is immediate emotional gratification, lose yourself. It’s a lot of fun. If you want to know if you’ll be happy by the time he’s done (assuming he wins and gets re-elected), ask yourself what he’s willing to alienate the majority of Americans to get, and ask if you’re happy with that.