what are they trying to hide?
Charlie Savage writes about the Boston Globe survey of the top twelve presidential candidates (Joseph Biden, Hillary Clinton, Christopher Dodd, John Edwards, Rudy Giuliani, Mike Huckabee, John McCain, Barack Obama, Ron Paul, Bill Richardson, Mitt Romney, and Fred Thompson) on executive power and signing statements.
Biden, Dodd, McCain, Paul, and Richardson each eschewed the use of signing statements altogether, as contrasted with more equivocal statements by other candidates. Three of the GOP's candidates (Giuliani, Huckabee, and Thompson) didn't respond to the survey, which prompted fellow Republican candidate Ron Paul to ask, "What are they trying to hide?" Paul asked. "Why are they embarrassed to answer the questions?"
I suspect that they're trying to hide their inability (or unwillingness) to restore honor and integrity to the White House.