BURBANK, Calif. (AP) — Riding in on a borrowed Harley-Davidson, John Kerry appeared Tuesday on "The Tonight Show With Jay Leno" as rancor within his presidential campaign continued to boil. The Massachusetts senator, wearing a leather jacket, blue jeans and a denim shirt, rode the motorcycle onto the stage. The Democrat talked mostly politics during the interview with Leno, generating few laughs. He criticized George Bush's handling of the war in Iraq and told the president to "get off his high horse" and involve other countries in postwar efforts. Kerry also said the improving economy wouldn't be a major issue...