Really Wonderful for the Most Part
Spoilers) The plot is exquisitely laid out, the characters are painted vividly- you can really see them-, as well as feel the tensions between governmental entities. From a character development sense, Trevayne and other characters come to see, for instance, Army personnel, in a more compassionate way (and vice versa with some of the Army personnel).
The reason I give this book 4 Stars is the ending. After Trevayne reaches the Presidency, he is able to address to some extent some of the issues he's been fighting for throughout the novel, but, from what I can tell, hasn't been able to reign in Gennessee Industries, his main goal in the book. Thus, the ending, although maybe "realistic," was very anti-climactic for me. The ending was so underspoken and briefly expedited with, that I kept reading a few pages after the ending before realizing I was reading the "extra" of the first chapter of the Bourne Identity that the publishers had inserted at the end! (Made me laugh!) There were also a few minor plot strands that weren't tied up, something I've found in other Ludlum books; for instance, you end up connecting with Bonner, but there's no final conversation or connection between Bonner and Trevayne at the end, given their significant connection throughout the book.
These last criticisms I've found in many of Ludlum's books: a drive to finish the ending of a book as soon as possible, and sometimes not tying up loose ends. Perhaps he felt the reader would be impatient by that point and would just want it over as soon as possible, or maybe he himself just wanted it done with, or maybe his publisher said, "Bob, deadline . . . we got a deadline here!"