A supporter of US President Donald Trump pleaded guilty on Thursday to mailing crude bombs to prominent Democrats including former president Barack Obama and former Democratic presidential nominee Hillary Clinton, Agence France-Presse (AFP) reported.

Cesar Sayoc, 57, who was arrested in Florida in October, pleaded guilty to 65 counts and could face life imprisonment at his sentencing in September.

During an appearance in a US District Court in New York, he admitted to fashioning the homemade bombs.

“I know these actions were wrong and I am sorry,” he told the court, in a barely audible, choked voice.

Besides Obama and Clinton, those targeted included billionaire George Soros, former president Bill Clinton, former vice president Joe Biden, actor Robert De Niro, and several Democratic lawmakers.

None of the packages exploded, and most did not come anywhere near their intended recipients.

A former strip club manager and bodybuilder and martial arts practitioner, Sayoc was an ardent supporter of Trump, who has rejected accusations that his rhetoric fuels extremism.