MORE MILLIKENS NEEDED…. A few more of these, and the McCain campaign ought to get concerned.

He endorsed John McCain in the presidential primary, but now former Republican Gov. William Milliken is expressing doubts about his party’s nominee.

“He is not the McCain I endorsed,” said Milliken, reached at his Traverse City home Thursday. “He keeps saying, ‘Who is Barack Obama?’ I would ask the question, ‘Who is John McCain?’ because his campaign has become rather disappointing to me.

“I’m disappointed in the tenor and the personal attacks on the part of the McCain campaign, when he ought to be talking about the issues.”

Milliken, a lifelong Republican, added that the notion of Sarah Palin becoming president of the United States is “appalling,” and lamented his party “moving toward rigidity.”

I suspect there other Republican officials, watching this campaign unfold, and cringing as they watch McCain disgrace himself. Rep. Wayne Gilchrest, a Maryland Republican, even broke party ranks and endorsed Obama/Biden a few weeks ago.

If others are on the fence, wondering if they should act on their conscience and denounce McCain as he shames himself and dishonors his legacy, now would be a very good time for them to make up their minds.

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Follow Steve on Twitter @stevebenen. Steve Benen is a producer at MSNBC's The Rachel Maddow Show. He was the principal contributor to the Washington Monthly's Political Animal blog from August 2008 until January 2012.