The 2012 presidential candidates were Barack Obama, Mitt Romney and Gary Johnson. Obama won both the popular vote and electoral college, defeating the Republican nominee Romney to win a second term as president of the United States.
Obama's running mate was Joe Biden, while Romney's running mate was Paul Ryan. While Obama and Romney were the Democratic and Republican nominees, Gary Johnson was the nominee of the Libertarian Party. Johnson was the former governor of New Mexico and is also a businessman.
Obama secured the Democratic nomination as the incumbent president, while in the Republican Party's presidential primaries, Romney's challengers included Newt Gingrich and Rick Santorum.