Instruct: Classify an Amazon review as either positive or negative.
Query: A riveting biography of a complex politician.

Walth chronicles the life and times of Oregon's most sacred politician. Tom McCall was an outspoken conservationist who pushed his agenda with honor. Yet he had personal failings -- a drinking problem, a drug-addicted son -- that Walth didn't sidestep, but instead presented tastefully. This is a top-notch political biography.