If Obama wins on Tuesday night, Chris Matthews's mocking this morning of the notion that the polls are tightening will be soon forgotten. But if McCain pulls off the upset, Matthews's show of smirking triumphalism will take its place in the halls of journalistic hubris near the famous photo of Harry Truman holding up the Dewey Defeats Truman front page. Just before Matthews came on, Andrea Mitchell ended her set-up segment by mentioning that the McCain campaign had released internal polls showing the race tied in the battleground states. When Meredith Vieira opened the Matthews interview by asking him to...