Political analyst: Several years ago, McFarlane, the military dictator, had Brooks, the former prime minister, arrested on charges of corruption.
Conclusion (So)
Brooks will have few supporters in this country.
Evidence
Brooks was arrested on charges of corruption several years ago, by McFarlane (the military dictator).
Brooks is now pardoned and has agreed to join McFarlane's government.
Almost all of McFarlane's supporters believe Brooks is guilty of corruption. And almost all of McFarlane's opponents will oppose anyone who agrees to join his government.
Evaluate
The goal is to prove that Brooks will have few supporters, and the author is trying to do so by arguing via a "Damned if you do, damned if you don't" style of binary.
She's trying to make the case that,
M's supporter → think B is guilty of corruption
M's opponent → don't support anyone agreeing to join M's govt (as B has)
We want to ask ourselves whether both of those roads end in the idea of "Brooks does not have their support", and then we also want to ask whether those are the only two starting points.
The author has established that if you're an opponent of M, then you will oppose Brooks, since she has agreed to join his government.
But the author hasn't established that if you're a supporter of M, that you'll oppose B. She's only established that if you're a supporter of M, you think Brooks is guilty of corruption.
So there is a Missing Link assumption happening here that,
If we were trying to think of Objections (for the sake of Defender assumptions that would rule them out), we'd be trying to think of ways to argue that even given this evidence, it's possibly that Brooks has many supporters.
One possible objection could be,
Goal
Look for a link from "If believe guilty of corruption, then don't support" or look for an answer ruling out the possibility that we're failing to consider people in this country who are neither supporters nor opponents.