According to the US Census, "In 2012, the overall voting rate was 61.8%." "Overall, in the last five Presidential elections, the non-Hispanic White share of total votes cast dropped by about 9 percentage points. In comparison, between 1996 and 2012, the Hispanic share of total votes cast increased by about 4%, while the Black share increased by about 3%."
The Washington Post writes, "And while Obama did loose White voters by 20 points to former Massachusetts governor Mitt Romney (the widest losing margin for a Democratic presidential candidate since 1984) he still won a clear popular vote victory - with a majority of his total vote nationwide coming from White voters." How about that folks. The majority of people who voted for President Obama were White! Let's go!