Many years ago, legendary San Francisco Chronicle columnist Herb Caen described his city as "the only city in America that boos Willie Mays and cheers Khrushchev." Kentucky Senator Rand Paul is hoping San Francisco is about to buck that legacy. The logic behind Republican Presidential candidate Rand Paul's recent decision to open a campaign office in San Francisco is not difficult to understand. Mr. Paul is betting that the essentially Libertarian ideology of the new tech economy will soon have a political impact in San Francisco, a city that for decades has generally been understood to be the most left-of-center metropolis in the country. Mr. Paul's gamble has implications for other cities as well, not least New York.