President Obama is barred by constitutional term limits from seeking re-election in 2016. A large crowd of candidates will likely compete for the Democratic and Republican nominations. Plus there are LOTS of likley third party and independent P2016 hopefuls. So, if a person is running, or thinking of running -- regardless of party, ballot status, or chances of winning -- we have him or her listed below. Incumbent party first, following by the main opposition party, then the third party candidates, and finally the independent and write-in hopefuls.