Well, I suppose the dictionary definition would be a dynasty defined either as a succession of family members or a lengthy amount of time a single family is in power.

Nonetheless, you chose to focus your attention away from my comparison of the Bush family to despotic ruling families in other regions, like Haiti and the Middle East.

You can argue the pedantic points of dynasties, of course. The point I was making was about political despots, which I believe both Papa Bush and Baby Bush are prime American examples.