Perhaps intersperse your hard analysis with sections about one or two particular example to contextualize what you are driving towards. Depending on your target audience it could be a Mom and Pop story that is less a heavy news piece and more of a "human interest" angle that illustrates a pragmatic example of your point. Someone that was helped by the effort, for example, and then maybe contrast that with a "but across town" example of someone that was hurt by an initiative. For example, I remember reading an extremely long read a few years ago about a libertarian public interest law firm called The Institute for Justice. They generally choose sympathetic Mom and Pop type of cases to litigate but the big picture is that they are fighting for big business rights. So the article contextualized their political big picture with the small picture example of the Caswell Motel. Hope that helps.
I guess that giving some of the history behind the Chamber and why they are doing what they are doing, and specifically breaking down the Powell Memo and the meaning behind it would be similar to that. As well as breaking down one of the bills they lobbied for, and a testimony against the bill, which I go into detail about why the bill is bad. I'm not exactly sure if that counts. Maybe I could add onto that by giving some narrative of someone who has been hurt by the very thing the bill would make harder to get compensation for, which is asbestos exposure. Although, I have other instances of lobbying I want to go into, since there are quite a few, and I want to make sure people realize the depth of the situation of lobbying as a whole. So going into one instance too much might just complicate the article too much.
There are so many that would fit well as a contrast there. And an individual account would undoubtedly fit well as a "Mom and Pop" story. Ralph Nader and Unsafe at Any Speed particularly annoyed Powell if I remember correctly. Or you could use many examples without going into one in depth.