This is a hefty collection of newspaper columns and speeches. One shortcoming is that the same idea is often repeated a half-dozen times (in a half-dozen columns) and so we never get the depth that would otherwise be expected from a 350-ish page book with small print, because it's like reading a similar column over and over rather than reading chapters that build on each other.
Opponents' arguments are not explored in detail either, so sometimes I felt he was making straw man arguments. Just because some spokesperson of some organization made a statement to the media does not mean that whatever they said is at the heart of the worldviews of most actual Americans nor that what they said accurately or meaningfully reflects any of the various possible meanings of liberalism.
That aside, he remains a very strong columnist, even if I disagreed with some of his positions and approaches.