(BUSINESS INSIDER) Mark Salter, who was a top adviser on the 2008 presidential campaign of Sen. John McCain (R), is not a fan of Wisconsin Gov. Scott Walker (R).

On Thursday, Salter went on Facebook and posted an article criticizing a comment Walker made about the jihadist group Islamic State (also known as ISIS or ISIL) at the Conservative Political Action Conference. Salter added a colorful comment

“I want to like him but Scott Walker is kind of a dumb a–,” Salter wrote.

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