César Sayoc, accused of sending 16 homemade bomb packages to 13 public figures, including former President Barack Obama and former Secretary of State Hillary Clinton, was found guilty Thursday before a judge in New York, Efe told the Prosecutor's Office.
In his appearance before magistrate Jed Rakoff of the Federal Court of Manhattan, Sayoc said he felt what happened.
"I'm sorry, really," Sayoc said, according to local channel NBC.
A federal grand jury in the United States charged Sayoc with 30 charges on November 9.
Six days later, the defendant, 56, pleaded not guilty to all charges against Rakoff.
At first, an appearance by Sayoc was scheduled to begin preparations for the trial, but it was changed on March 15, after the defendant showed his intention to plead guilty.
Among the crimes charged are the use of a weapon of mass destruction so that he could be sentenced to life imprisonment, the transport of explosives between states, so he could spend up to 20 years in jail, or the illegal use of mail, which could mean up to 10 years.
Sayoc is accused of sending bomb packages to Hillary Clinton, former CIA director John Brennan, and National Intelligence Service James Clapper, tycoon George Soros and actor Robert de Niro.
He also sent homemade bombs to former Vice President Joe Biden; former Attorney General Eric Holder; Congressmen Maxine Waters, Cory Booker, Kamala Harris and Debbie Wasserman, as well as Democratic philanthropist Thomas Steyer, in others.
None of the packages, sent by the Postal Service, exploded or caused physical damage to recipients, Democratic trend.
Sayoc was arrested on October 26 in Plantation, Florida, a week after authorities intercepted the first package, destined for Soros.