Bush-Clinton-Bush-Clinton-?

I just had a scary thought... people are saying Hillary Clinton is a frontrunner to run for President in '08.  If she wins, the succession of the last 4 presidents will have been Bush-Clinton-Bush-Clinton.  But why stop there?  What if Jeb Bush wins in '12, and since Chelsea Clinton was born in 1980 she'll be over 35 and eligible to run in '16!  Bush-Clinton-Bush-Clinton-Bush-Clinton?!  Scaaarry thought...