I guess the "Marxist" definition is different overseas, same with communism.
Marxist (marxism):
1)a belief that capitalism is based on the exploitation of workers by the owners of the means of production
2)a belief that people's consciousness of the conditions of their lives reflects the dominant ideology which is in turn shaped by material conditions and relations of production
3)an understanding of class in terms of differing relations of production, and as a particular position within such relations
4)an understanding of material conditions and social relations as historically malleable
5)a view of history according to which class struggle, the evolving conflict between classes with opposing interests, structures each historical period and drives historical change
6)a belief that this dialectical historical process will ultimately result in a replacement of the current class structure of society with a system that manages society for the good of all, resulting in the dissolution of the class structure and its support (more often than not including the nation state)
Communism is
mostly the same except the willingness to use the military to fulfill ideals (in Obamas case ideals being
replace upper class with working class or more precisely
non-working entitled class).
That pretty much sums up my understanding of Obama.