I understand you may not love (or even like) Mrs. Clinton right now. Perhaps you can’t imagine knocking on doors for her in the cold or donating your hard-earned money to finance her campaign. I’m doing both of those things, but I realize that you may not want to. I felt the same way about Mr. Obama in 2008. In the end I didn’t work hard to get him elected (I really regret that now, by the way), but neither did I do or say anything that would harm his chances. I came to accept that he was, in fact,...