WASHINGTON -It is already easy to imagine the Republican attack ads against Barack Obama. They open with video of his wife, Michelle, saying she was proud of America "for the first time in my adult lifetime" because of her husband's presidential candidacy. Cut to the Illinois Senator explaining that he doesn't wear an American flag lapel pin because it is a "substitute for true patriotism." Then flash a clip of Obama explaining that his Caucasian grandmother was a "typical white person" because she uttered racial epithets and was afraid of black people. Finally, the coup de grace, pictures of Obama's...