Yes.
If we put 3x caught pot dealers in for life, a corrupt President can certainly rot alongside them.
The more powerful you are, the more significant the penalties for abuse of that power should be, because the damage you can do is correspondingly large.
Don’t think the three strikes law you are referring to (3x nonviolent = life in prison) exists anymore. As it was generally regarded as a cruel mistake. Likewise with hanging politicians for lying…