Jimmy Carter may or may not have been the worst president of the 20th century — history will have the final word on that — but his disgraceful performance yesterday at Coretta Scott King's funeral marks him as the most shameless. Maybe of all time. There is, after all, a time and place for everything — but not for Carter. In a reprehensible (albeit typical) display of tone-deafness, the former president used the funeral of Dr. Martin Luther King's widow to score cheap points against President Bush. (He wasn't alone in that regard, more of which in a bit.) Carter...