I’ve been pondering this exact issue. I even drew up a calendar of who held Congress and who was President from Roosevelt on. Perhaps the best way to show this is with easily-understood charts. I agree: it must be done! And your post or at least the idea of it needs to be spread to all the conservative talk show hosts. Let’s keep this thread going so someone who might have a better idea of how to present the data can see there’s an interest in it and a real need for it.
This is one of the relative strengths of the parliamentary system, in that the majority legislative power or coalition of powers have responsibility for the executive. That and if their version of the president sucks they don’t have to wait four years.
Maybe you can research the data and chart it the best you can and post on FR, asking others to improve upon it with their special skills.