“SEN. JOHN KERRY’s Economic Policies Would Cost Jobs in Ohio,” a headline on the Bush campaign Web site asserts. “The most crooked, you know, lying group I’ve ever seen,” Mr. Kerry says of his Republican adversaries. “Sen. Kerry Flip-Flops on Israel,” says the Bush campaign. “Once again, George Bush is misleading America,” a Kerry advertisement charges. “So’s your mom,” says — no, wait. We haven’t seen that one yet.