WASHINGTON — Gunman Cole Allen sent an anti-President Trump manifesto to his family members about 10 minutes before opening fire at Saturday night’s White House Correspondents’ Dinner — calling himself the “Friendly Federal Assassin” and revealing he was trying to kill Trump administration officials, The Post has learned.

“Turning the other cheek is for when you yourself are oppressed. I’m not the person raped in a detention camp. I’m not the fisherman executed without trial,” Allen wrote in the document, which a relative provided to police, a US official said.

“I’m not a schoolkid blown up or a child starved or a teenage girl abused by the many criminals in this administration. Turning the other cheek when *someone else* is oppressed is not Christian behavior; it is complicity in the oppressor’s crimes.”

Allen described his targets as including “Administration officials (not including [FBI Director Kash] Patel): they are targets, prioritized from highest-ranking to lowest.”

“I am no longer willing to permit a pedophile, rapist, and traitor to coat my hands with his crimes,” Allen wrote, apparently referring to the president.

“In order to minimize casualties I will also be using buckshot rather than slugs (less penetration through walls). I would still go through most everyone here to get to the targets if it were absolutely necessary (on the basis that most people *chose* to attend a speech by a pedophile, rapist, and traitor, and are thus complicit) but I really hope it doesn’t come to that.”

This is a developing story. Please check back for updates.