Rove Question

In some ways, this is a routine, expected news item, but it does raise one question.

Rove Is Giving Up Daily Policy Post to Focus on Vote

By ELISABETH BUMILLER
Published: April 20, 2006

WASHINGTON, April 19 — The overhaul of the White House staff intensified on Wednesday as Karl Rove, one of the president's most powerful and feared advisers, gave up day-to-day control over the administration's domestic policy to concentrate on the midterm elections. Scott McClellan, the White House press secretary, said he was stepping down. [...]

What I want to know is this: if this guy's job is to "concentrate on the midterm elections," then why is he drawing a government salary?