Assuming all the current Internet buzz about the assasination of JFK is true, I would suggest that the involvement of the Bush family and the C.I.A would make it my choice. However, Bush was not the president at that time... . So... .
If there is NO truth to that, then I would suggest a prez that de-regulated the banking industry. Bush light I suppose again.
So who specifically is the biggest crook? Nixon wasn't the biggest crook, but very close.
Clinton and Lewinsky puts him near the top, too. Although the economy was doing well I believe.
???