To paraphrase an old saying: if you open the door, blame yourself for the flies.
Electing a black man or a woman to the presidency is acceptable to the media and even a moderately sized minority of the electorate (no doubt thanks to media activism). But opening doors to new 'demographics' is dangerous. With hyper-leftwing media support, Americans will be told they accept the minority or woman president. This opens the door further, and in our lifetimes atheists, gays, pee-fetishists, Muslims, and God-knows-what have the chance to become president. Who knows, maybe we will elect a monkey!
Then, I will believe in evolution.
Think about this if you consider vote against McCain.