Tom Harkin Leaving the Senate

You've probably heard that Tom Harkin has announced that he will not be running for reelection to the Senate in 2014.
You may think of him as a reliably liberal and pro-union voice in the Senate, and you'd be right. What you might be less aware of is that he's also one of the best friends of quacks, health scammers, and the antiscientific mindset in Congress.