Discourse: The reaction to the congressman's outburst shows what happens when you judge this president by the content of his character. In a post-racial presidency, charges of racism are the new last refuge of scoundrels.When Joe Wilson, the decorum-challenged South Carolina Republican, reacted to President Obama's assertion that there was nothing in health care legislation giving coverage to illegal aliens by shouting "You lie!" he knew, as his critics ignore, that there was nothing requiring proof of citizenship either. A nonpartisan Congressional Research Service study found that the House health care bill at that moment did not restrict illegal immigrants...