Harper's blog profiles Rep. Joseph "Jeb" Bradley (R-NH), a reformed-hippie conservative whose vote history tracks closely with his investments:

Bradley has voted in a way that makes him look more like a stockholder than an elected representative. For example, he owns nearly $1 million in oil, gas and electric company stock and has taken over $45,000 in campaign contributions from energy industry PACs. Bradley has consistently voted with energy interests since taking office, often stripping key environmental and consumer protections in the process. It's a textbook case of why there should be some financial threshold at which it becomes mandatory for members of Congress to put their wealth in blind trusts.

Vote your wallet, indeed.