Read the whole thing:
In 2007-2008, the whole point of examining Obama’s performance as a U.S. Senator, however, was to test whether it demonstrated his preparedness to become president. My overall point back then was that based on his actual track record, in comparison with any president going back at least to Andrew Johnson, Obama was objectively unprepared for the job. And because he was unprepared for the job, I further argued, we could reasonably infer that he would most probably botch it. ….
He’s no longer wholly untested. He’s now been thoroughly tested — and on the same job for which he’s seeking a four-year extension.
But the world can see that he’s botched it already. We don’t have to guess whether he’d botch it further in the next four years, no more than we had to guess about Jimmy Carter.