You can at least remove the pursestrings from the executive by changing Congress from the rubber-stamp it currently is.
How would/should our system recover if a President commits all sorts of crimes with the support of 34 senators?
(Bonus fun fact: The theoretical minimum popular support needed for 34 senators would be 3.6% of the population.)
Heck, if would be very difficult to craft any factual account of political events these days that Me-of-2005 wouldn't dismiss as mad ramblings.