Plot summary
Due to the recent reveal of B613's existence, Olivia meets with Lonnie Mencken, who says he will make sure they get a proper Senate hearing if Mellie makes gun control her first priority. After Olivia agrees, he shoots himself to ensure the hearing takes place, leaving David in charge. At the senate hearing Olivia admits to ordering Rashad's assassination, Mellie and Fitz admit they knew of B613, Tom confesses to killing Frankie Vargas under Cyrus' orders, and Hollis admits to being a part of election fraud. Everyone starts to deal with their impending imprisonment while helping get Quinn to Charlie so they can get married.
After failing to kill David, Jake tells Cyrus he is not going to take his orders anymore. On his quest to have Mellie impeached, Cyrus poisons David and smothers him. The ruling is postponed due to a new witness coming forward: Rowan; he admits to being command. Jake is imprisoned for his actions in B613. An alcoholic Cyrus resigns as vice president. Mellie approves of the bill on gun control to law. Two young girls visit the gallery where there is a portrait of Olivia.
Credits
Adapted from Wikipedia contributors, Scandal season 7. HTML formatting and reference markers removed.