As first heard on KTTH's Sitman and Boze show.  From a link found at Hotair

Sen. Kerry found himself all alone while he was over here. He cancelled his press conference because no one came, he worked out alone in the gym w/o any soldiers even going up to say hi or ask for an autograph (I was one of those who was in the gym at the same time), and he found himself eating breakfast with only a couple of folks who are obviously not troops.

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What is amazing is Bill O'Reilly came to visit with us and the troops at the CSH the same day and the line for autographs extended through the palace and people waited for two hours to shake his hand.

Maybe they were just too dumb to know who he was.