I observed in my Sunday column that Rudy is alienating the single most important group of voters to win the GOP primary. Rudy's unrepentant commitment to all the wrong sides of every social issue - family, kids, guns - the fallout is starting to show.

Dr. James Dobson explains his issue:

True to form, liberal pundits loved Rudy's Houston speech. Some praised him for being "brave" and "historic." In what sense, pray tell? I see nothing courageous about trying to have it both ways in the name of political ambition. He told the crowd he is "firmly committed" to marriage remaining legally defined as the union of one man and one woman. However, he opposed the Marriage Protection Amendment when it was being considered by Congress. Giuliani must have known then, and surely understands now, that the courts have taken dead aim at the institution of marriage, and that the only way to secure it is with a federal constitutional amendment. But the tap dancing continues.

This self-styled defender of marriage says he is "proud" of having submitted, as New York's mayor, a bill creating "domestic partnerships" for homosexual couples. Admittedly, many liberal Americans will agree with the social positions espoused by Giuliani. However, I don't believe conservative voters whose support he seeks will be impressed. Presidential elections are won or lost by slim margins. Rudy has an uphill slog ahead of him, even though he is the darling of the media.

There are other moral concerns about Giuliani's candidacy that conservatives should find troubling. He has been married three times, and his second wife was forced to go to court to keep his mistress out of the mayoral mansion while the Giuliani family still lived there. Talk about tap dancing. Also during that time, the mayor used public funds to provide security services for his girlfriend. The second Mrs. Giuliani finally had enough of his philandering and, as the story goes, forced him to move out. He lived with friends for a while and then married his mistress. Unlike some other Republican presidential candidates, Giuliani appears not to have remorse for cheating on his wife.

Harry Truman asked, "How can I trust a man if his wife can't?" It is a very good question. Here's another one: Is Rudy Giuliani presidential timber? I think not. Can we really trust a chief executive who waffles and feigns support for policies that run contrary to his alleged beliefs? Of greater concern is how he would function in office. Will we learn after it is too late just what the former mayor really thinks? What we know about him already is troubling enough.

One more question: Shouldn't the American people be able to expect a certain decorum and dignity from the man who occupies the White House? On this measure, as well, Giuliani fails miserably. Much has been written in the blogosphere about his three public appearances in drag. In each instance, he tried to be funny by dressing like a woman. Can you imagine Ronald Reagan, who loved a good joke, doing something so ignoble in pursuit of a cheap guffaw? Not on your life.

My conclusion from this closer look at the current GOP front-runner comes down to this: Speaking as a private citizen and not on behalf of any organization or party, I cannot, and will not, vote for Rudy Giuliani in 2008. It is an irrevocable decision. If given a Hobson's – Dobson's? – choice between him and Sens. Hillary Clinton or Barrack Obama, I will either cast my ballot for an also-ran – or if worse comes to worst – not vote in a presidential election for the first time in my adult life. My conscience and my moral convictions will allow me to do nothing else.