How many people actually listen to Rush Limbaugh, the radio talk titan White House officials have spent the past week characterizing as "the head of the Republican Party"? According to what Limbaugh delights in calling "the drive-by media," the number varies wildly. Is it 30 million (Pat Buchanan on MSNBC), 20 million (Time magazine, ABC News), 19 million (Fox News), 14 million (CNN), or "14.2 million to about 25 million" (The Washington Post)?