If and when there is positive proof that George W. Bush committed crimes of any sort.
I'll be the first one to demand that he resign.
IMO, even with positive proof, the president is immune from a potentially corrupt judicial system. The founding fathers realized this and put it in the constitution. It takes impeachment with a senate trial or an election to remove a president.
You should demand that he be impeached, and in Nixon's case he would have been, given the number of Rinos then.
Bush is harder to get impeached as the house is controlled by Republicans. But the NYT,and Franken etc, beating Bush to shreds, that's a different story. It's the Nixon story.