Cesar Sayoc Jr., who pleaded guilty to charges related to mailing explosive devices to prominent Democrats, said this week that attending President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's rallies became like a "drug" for him before his arrest.

He made the comment in a letter to a federal judge, writing that the rallies "became like a new found drug," and thanking Trump for saving his life after he says he almost took his own life.

Sayoc also wrote in the letter that "politics is dirty, ruthless, deadly" and "sucks you in radical on both the right and left."

The letter, which details Sayoc's mental state and alleged use of steroids for over 40 years, has been posted in his case file. His lawyers plan to cite the details at his August sentencing hearing.

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He is accused of sending pipe bombs in the mail to Democrats who have been critical of Trump, including Rep. Maxine Waters Maxine Moore WatersPowell, Mnuchin stress limits of current emergency lending programs Pelosi: House will stay in session until agreement is reached on coronavirus relief Omar invokes father's death from coronavirus in reaction to Woodward book MORE (D-Calif.), former President Obama, former Vice President Joe Biden Joe BidenBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Democratic groups using Bloomberg money to launch M in Spanish language ads in Florida Harris faces pivotal moment with Supreme Court battle MORE and former Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE as well as several other elected Democrats, former administration officials, celebrities and news organizations. None of the devices exploded, and no one was hurt.

Sayoc, who was arrested in Florida last October, was charged with interstate transportation of an explosive, illegal mailing of explosives, threats against former presidents and certain other persons, threatening interstate communication, and assaulting federal officers. If convicted, Sayoc would face up to 48 years in prison.

He was previously arrested for theft, fraud, drug possession and making bomb threats in alleged incidents dating back to the 1990s.