If you want to, check out Historical rankings of United States Presidents.
My point? Experience does not seem the same as ability.
Now for the PBS presidential videos:
PBS American Experience has launched The Presidents Online at http://www.pbs.org/presidents/2008, as the online component of an unprecedented public television initiative that, for the first time, will make available more than 25 hours of presidential programming online, on TV, and on the go. The project comes at a critical moment in American politics: this year, American voters will take part in a landmark election, where for the first time in over a half-century, neither the sitting President nor vice president is a contender for the Oval Office.