How Powerful Is The President? Ctd

Yglesias joins the fray:

The White House's failure to engage in a maximum, 100 percent
for each item on the Obama agenda doesn't demonstrate that it's a
House that's time and again betrayed progressive values
demonstrates that even though in each case you can always do more, you tend to decide to leave some arrows in the quiver because there are so many legislative fights and you can't just be going nuclear thirty times a year.

Now it is true that I think one problem with...