Political manga

—> MC is reincarnated into a otome game where he takes the role of a butler for a 12-year-old marquise's daughter. There are two factions: elitists and commoners, and every exchange these kids have is lined with detailed politics despite their age. There is significance in even a cup of tea.

—> A villainess who was the once the mastermind behind some of the most brutal and influential deals has the blood of many on her hands, and eventually is killed for her actions. The intelligent female lead lives a different life when she is reborn, using her knowledge to support a good hearted man rather than her wicked brother. The FL is very involved in complicated politics, which makes this a manga you wouldn't want to click if you're interested in lots of romance.

—> Princess Yona lives a rich, sheltered, and carefree life. All is well till her father, the King, is murdered. Yona's journey to independence is full of politics as she dances around the throne, though in this case, the manga is more focused on her character development. But, I'll add it to this list anyways.

—> MC is Cinderella's evil step mother with a twist: she isn't so evil. While not overtly political, Mildred does weave around aristocratic politics to ensure the best lives for her children.