It's not an obfuscation You said "Older white Americans angry at a black president." Your links prove nothing. First, we have a secret ballot. And even though I guess people answered exit polls, who says they answered them truthfully and if they did, it says nothing about their motive. You can assume what it is, but you can't prove it or for that matter, even know it.
Some would describe me as an "older white American" (how old is old and how old is older?) and I voted for BO the first time but not the second time because I disagreed with his policies. The fact that he was black was only a coincidence. I resent someone saying I didn't vote for him because he was black which was your obvious insinuation.