Corporate Democrats often accuse progressives of being too idealistic, of subjecting potential candidates to a so-called purity test. Most recently that argument has extended to former vice president Joe Biden. His supporters say that he is the best possible candidate to defeat Donald Trump. That’s debatable to say the least. What’s not debatable is that refusing to support a man who voted to invade Iraq is hardly subjecting him to a purity test. Over 1 million people died there for no reason whatsoever. Anyone who had anything to do with it, especially someone who voted to authorize force there, has blood on their hands.