Aaron Sorkin urged his 15-year-old daughter to continue fighting after the presidential election.

“West Wing” ended a decade ago, but Aaron Sorkin still knows how he wants a presidency to be run.

Unfortunately, he and President-elect Donald Trump don’t see eye to eye.

“Well the world changed late last night in a way I couldn’t protect us from. That’s a terrible feeling for a father. I won’t sugarcoat it — this is truly horrible,” the “West Wing” creator wrote in an open letter to 15-year-old daughter Roxy on Vanity Fair.

“It’s hardly the first time my candidate didn’t win (in fact it’s the sixth time) but it is the first time that a thoroughly incompetent pig with dangerous ideas, a serious psychiatric disorder, no knowledge of the world and no curiosity to learn has.”

Sorkin has frequently spoken out against Trump leading up to his election on Tuesday, calling him the “end of political satire.”

However, he wrote to his daughter, hate was already given hope.

"The world changed late last night in a way I couldn’t protect us from," Sorkin wrote about Donald Trump’s presidency.

“And it wasn’t just Donald Trump who won last night — it was his supporters too. The Klan won last night. White nationalists. Sexists, racists and buffoons. Angry young white men who think rap music and Cinco de Mayo are a threat to their way of life (or are the reason for their way of life) have been given cause to celebrate,” Sorkin wrote.

“Men who have no right to call themselves that and who think that women who aspire to more than looking hot are shrill, ugly, and otherwise worthy of our scorn rather than our admiration struck a blow for misogynistic s—heads everywhere.”

The “A Few Good Men” writer urged his daughter to get up the next day, get involved and fight injustice.

“The battle isn’t over, it’s just begun. Grandpa fought in World War II and when he came home this country handed him an opportunity to make a great life for his family,” he wrote. “I will not hand his granddaughter a country shaped by hateful and stupid men. Your tears last night woke me up, and I’ll never go to sleep on you again.”