"Treehouse of Horror XIX" is the fourth episode of the twentieth season of the American animated television series The Simpsons.

In the opening scene, Homer tries to vote for Democratic candidate Barack Obama in the 2008 United States presidential election.

Homer takes Maggie to a daycare and encourages her to enjoy a mural featuring Krusty the Clown to make her feel better while she is away from her parents.

This leaves Maggie upset and an outraged Homer shoves Krusty in retaliation, accidentally sending him flying into a wood chipper, shredding him alive.

Homer is then hired as a celebrity assassin, taking out such famous faces as actor George Clooney, singer Prince, and astronaut Neil Armstrong.

Krusty's angel kills Homer, who gets revenge by locking all the celebrities out of Heaven, leaving only himself and the apparently gay Abraham Lincoln.

Realizing that Milhouse can bring things to life by believing in them, Lisa tells him about "Tom Turkey", a symbol of Thanksgiving.

Rather than taking sides in the election, executive producer Al Jean says it is "mostly a comment on what many people to believe to be the irregularities in our voting system.

It could not be titled "It's the Great Pumpkin, Milhouse" to exactly match its namesake because of a "big legal issue", according to Al Jean.

[8] The second segment features a parody of the opening of Mad Men and Homer kills several celebrities, including Kate Winslet, Prince, George Clooney, and Neil Armstrong, set to the song "Psycho Killer" by Talking Heads.

[15] Robert Canning of IGN gave the episode a 7.9/10, calling it "funny, entertaining and even nostalgic [which] only makes this yearly tradition that much better.

Canning wrote, "this segment may not be all that gory, but it's funny and, quite honestly, it will just make you feel good",[10] and Bentley described it as "a dead-on comedy assault of the Charlie Brown animated Halloween special.

"[14] Show Patrol wrote "The nostalgia factor makes “Grand Pumpkin” the best of these amusing bits for me, but they all lack that trademark “Simpsons” brand of satirical smartness.

"[9] Hal Boedecker of the Orlando Sentinel gave the episode a 4/5 and called the final segment a "witty parody of Charlie Brown's Halloween classic.

[18][19] Director Bob Anderson received an Annie Award nomination for "Best Directing in an Animated Television Production" but lost to Avatar: The Last Airbender.