I'm going to go out on a limb and say that you don't know much about Jefferson.
What the frick is that supposed to mean. Every 10th grader in this country knows a thing or two about Jefferson. As it happens, American history was one of my majors in college; the presidency was a particular interest of mine.
Jefferson was without a doubt among our most gifted and (in many ways) enlightened presidents. But this nation (and the world it inhabits) would be as foreign to him as an alien civilization. What makes you think he could effectively govern it?