Which political philosophy best describes Obama?

[frank m]

Populism
Populism is a discourse which supports "the people" versus "the elites". Populism may involve either a political philosophy urging social and political system changes and/or a rhetorical style, deployed by members of political or social movements competing for advantage within the existing party system.
Communism
Communism is a socioeconomic structure that promotes the establishment of a classless, stateless society based on common ownership of the means of production.
Socialism
Socialism refers to the goal of a socio-economic system in which property and the distribution of wealth are subject to control by the community.
All of the Above