Why do the people vote Obama?

Answer 1

There are a number of reasons why people have voted for President Obama. In 2008, they voted for him because they believed he would do a better job than McCain/Palin, plus they were tired of what Republicans had done (at that point, Republicans were enmeshed in a number of scandals, and people were frustrated by the war in Iraq). Barack Obama was an eloquent speaker, and people perceived that he would bring change. In 2012, they voted for him because they thought he would do a better job than Mitt Romney. People believed that Romney only cared about the very rich, and would only implement policies that benefited the wealthiest Americans. (Whether that was true or not, that was what the majority believed.)

another answer:

Added: Why would we have voted for the other choices? Many times this is how people vote in the US as there is no voting down of candidates. The two Presidential choices running against Obama were not acceptable on basically the same grounds. This is a secular Democratic Republic, not a crypto-theocracy. Palin, too close to the Presidency, and Romney were not suitable on these grounds. Read and understand The First Amendment and the Establishment Clause.