As the current President of the United States, Obama is part of the Democratic party. Democratic supporting states are most strongly supported on the coasts of America, whilst the republican party is notoriously strongest in the most major rural areas of America (fly over country). The democratic party has also begun to dominate some southern states (usually republic) such as New Mexico, due to the influx of Hispanic migrants from across the border. The democrats took into the election, the idea of progressive taxation (higher tax rates for higher income brackets). The voting for Obama also suggests the increased acceptance and support of same-sex marriage, which has become legal in certain states. The support for gay marriage is strongest on both the east and west coasts of the country, again explaining the popularity of the democratic party in those areas. Same-sex marriage is banned in many of the most rural areas (republican states), again explaining both the support for the republicans in those states (against gay marriage) and against the democrats, who support it. [http://www.freedomtomarry.org/states/]
Democrats: Prefer lower increases in military spending and are comparatively more reluctant to using military force against countries like Iran, Syria and Libya.
Democrats are also in stronger support for the maintenance and control of gun laws in the country, while the republicans favor attempting to abolish these laws, in favor of the 2nd amendment.
The general opinion now that Obama has been reelected, is the increasing support for the Democratic party. It shows that the population of the United States is changing into believing and supporting different aspects of life. It shows the increase of Hispanic and minorities in certain states, increasing support for the Democrats.