Obama v GOP

I don't understand why so many people think Obama doesn't have a chance in the next election; his closest contender is "Republican Candidate".

RCP average:

Obama beats any GOP by 5

Obama beats Romney by 6.3

Obama beats Paul by 8

Obama beats Gingrich by 13

Obama beats Pawlenty by 14.1

Obama beats Daniels by 15

Obama beats Bachmann by 17

Obama beats Palin by 19.5

Source:

http://www.realclearpolitics.com/epolls/2012/president/president_obama_vs_republican_candidates.html