
Omar Gonzalez, 43, of Cooperas Cove, Texas, pleaded guilty to charges that he climbed over the White House fence, pushed past a Secret Service agent guarding a door and entered the executive mansion.
The high-profile breach played a part in a shake-up of Secret Service leadership. Judge Rosemary Collyer will sentence Gonzalez in US District Court at 10am.
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Gonzalez's attorney, federal public defender David Bos, is seeking a sentence of time served for the nine months he has been held in jail, followed by three years of supervised release.
Bos has argued that Gonzalez is a first-time offender and an Iraq War veteran. He suffers from post-traumatic stress disorder and is undergoing mental health treatment, he has said.
Federal prosecutors want a 21-month sentence. They say Gonzalez needlessly endangered White House occupants and Secret Service officers.
Gonzalez was carrying a folding knife when he was arrested inside the White House. He told a Secret Service agent that he needed to tell President Barack Obama that the atmosphere was collapsing.
Police discovered ammunition, a machete, knives and weapons accessories in his truck. The Obamas were not in the White House when the incident occurred.
Gonzalez pleaded guilty in March to entering a restricted building while carrying a deadly weapon and assaulting a Secret Service agent.
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