Women are not fungible. I don’t know if anyone sitting around with John McCain in the last few days has explained that to him; frankly, I don’t know if there even were any women sitting around with John McCain in the last few days. But, I think I understand a few things about Hillary’s base in the Democratic party, and why so many women have been so loyal to her, and if John McCain thinks that simply picking another person with similar anatomy is going to win their votes, he’s about to learn a very important lesson in gender politics....