Follow-up on the weak, impotent, helpless presidency

After I fulfilled Jonathan Chait's plea for a substantive response to his and Jonathan Bernstein's argument that the President is weak and impotent when it comes to influencing Congress and thus not to be blamed for what they do or don't do, he "replies" today by ignoring most of the arguments I made and distorting the rest.  Others have responded to my argument a bit more substantively, but I'm content to let stand the extensive arguments I made yesterday which, in my view, disprove this...