One common perception in America today is that this administration operates under the implication that those who disagree with it are somehow less patriotic/traitors. This has played out for several years.
So what would they say to someone who said that Iraq was the "biggest foreign policy blunder in the history of our nation?" Another defeatist Democrat? An America-hating liberal? How about Republican Chuck Hagel?
Of course, he's retiring, so he's free to make such statements without it looking like he's politicking. The question next will be - how to address this latest example of dissention?