WASHINGTON -- Jude Wanniski might have been called the most important journalist of his time, except that the former reporter and editorial writer was never really a journalist. He was an advocate who changed the world. He fathered supply-side economics, which became the doctrine of the Republican Party and enabled it to be the nation's ruling party most of the last half-century. When Wanniski died of a heart attack Monday, he was at the low point of his political influence. The doors of the mighty that opened for him in the '70s and '80s long had been closed. In an...