yes
November 6, 2012 is the date for the next Us presidential election and Barack Obama is indeed a candidate for re-election.
2008
President Barack Obama
Barack Obama served as US Senator from Illinois prior to becoming a candidate in the 2008 Presidential election.
the people voted for him through an election
If you are asking about the presidential election of 2008, Barack Obama won a decisive victory, defeating John McCain to become the first black president in US history.
If you are referring to the 2012 general election Barack Obama won his second term as US President.
Yes, he won the election and became the first African-American president of the US.
In the US system there are two main parties that oppose one another at elections, the Republicans and the Democrats. Barack Obama is a Democrat.
No US president qualifies for this statement, unless you count Barack Obama defeating himself. George Walker Bush was the president before Barack Obama. John McCain, senator from Arizona was defeated by Barack Obama in the 2008 presidential election.
He voted for himself in the 2008 US Presidential Election when he won the Presidency.
Barack Obama is the incumbent US President, now campaigning for election to a second term.