MANY have wondered if my invitation to Senator John McCain to deliver the commencement address next Saturday to our graduating class at Liberty University represents my support for his possible run for the presidency in 2008. It does not. The senator's speech does not symbolize an endorsement of an unannounced candidacy on my part, and it does not mark the quest for such an endorsement on his part. Mr. McCain has never sought such an endorsement, and I have not offered one. To understand the significance of Mr. McCain's commencement address, it helps to understand Liberty University. Since I founded...