In the seven years since I cofounded Republicans for Environmental Protection, officially known as REP America, I have answered two questions more often than any others: "Isn't Republicans for Environmental Protection an oxymoron?" And, "If you care so much about conservation and environmental protection, why don't you become a Democrat?" The first one is easy to answer. No, Republicans for Environmental Protection is not an oxymoron. I can rattle off a list of Republican presidents, senators, representatives, governors, and ordinary citizens who fought hard for the laws that cleaned up our air and water, protected our natural resources, and saved …