What types of secrets does Finnick hold?

Finnick has gathered all kinds of secrets......

Tales of strange sexual appetites, betrayals of the heart, bottomless greed, and bloody power plays. Drunken secrets whispered over damp pillow-cases in the dead of night. Finnick was someone bought and sold. A district slave. A handsome one, certainly, but in reality, harmless. Who would he tell? And who would believe him if he did? But some secrets are too delicious not to share. I don't know the people Finnick names--all seem to be prominent Capitol citizens--but I know, from listening to the chatter of my prep team, the attention the most mild slip in judgment can draw. If a bad haircut can lead to hours of gossip, what will charges of incest, back-stabbing, blackmail, and arson produce? Even as the waves of shock and recrimination roll over the Capitol, the people there will be waiting, as I am now, to hear about the president.

"And now, on to our good President Coriolanus Snow," says Finnick. "Such a young man when he rose to power. Such a clever one to keep it. How, you must ask yourself, did he do it? One word. That's all you really need to know. Poison." Finnick goes back to Snow's political ascension, which I know nothing of, and works his way up to the present, pointing out case after case of the mysterious deaths of Snow's adversaries or, even worse, his allies who had the potential to become threats.