I’m a major donor to the Democratic Party. Only one strategy can rescue the Dems: an open convention. Being a large donor to the Democratic Party is like having elective surgery. You know it’s the right thing to do, but you also know it will be painful. You are often going to be thrown under the bus by the very candidates you support. I would know. I maxed out my giving in the last four presidential elections to the Democratic candidate: Barack Obama, Hillary Clinton, Joe Biden, and Biden again, this cycle. Perhaps that makes me sound partisan, but I...