For Democrats up for reelection this fall, there's no time like the past. Don't talk about Barack Obama. Talk about George Bush. Don't address concerns about building a mosque at Ground Zero. Dismiss the objections as "McCarthyism." Opponents of gay marriage? They're the same people who unleashed dogs and fire hoses upon black people in the South. That's the Hot Tub Time Machine School of American Politics, which I dissect in my column @ Human Events.