Not long ago, after a string of especially bad days for the Obama administration, a veteran Democratic pol approached me with a pained look on his face and asked, "Do you think they know what they're doing?" The question caught me off guard because the man is a well-known Obama supporter. As we talked, I quickly realized his asking suggested his own considerable doubts. Yes, it's early, but an eerily familiar feeling is spreading across party lines and seeping into the national conversation. It's a nagging doubt about the competency of the White House. It was during George W. Bush's...