What is the author's perspective in the nonfiction book, Al Franken, Giant of the Senate?

Despite Franken's progressive allegiance and denunciation of the "rank partisanship" rampant in Washington, he adheres to a strictly partisan perspective throughout the text, often taking any avenue available to cast shame and disgust on the Republican party (235). He boasts of his progressive resume at the beginning of the text, and the intended audience for the remainder of the text - based on his expressed views and opinions - are progressives. However, the effort and creativity with which he denounces Republicans is typical of an establishment politician trapped in the two-party system. For example, Franken comically yet confidently asserts that "Republicans are just awful. They're beholden to corporate interests, they're dishonest and/or crazy, they're so cynical that they'd willingly thwart badly needed progress for the sake of their own selfish political motivations. So if we care about making progress in America, we need to fight them at every turn" (271). While this could be an example of Franken capitalizing on exaggeration, it also speaks to his underlying partisan perspective. Rather than finding ways to transcend the horrid two-party system like most progressive politicians, Franken's perspective remains trapped in the faulty two-party system.