WASHINGTON - It's not hard to deduce John Kerry's favorite Republican. The same person is also one of the Bush administration's least favorite Republicans - John McCain. On issues from Vietnam to reforming government, Kerry and aides frequently mention the Arizona senator who challenged candidate Bush and occasionally criticizes the president.As far back as 2002, at a dinner in South Carolina, Kerry referenced that state's fierce 2000 primary between Bush and the former Vietnam prisoner of war. "I know we all have great admiration for the way John McCain courageously endured years of unbelievable psychological torture by ideological fanatics," Kerry...