A jury has convicted a man who broke into former US House Speaker Nancy Pelosi’s San Francisco home seeking to hold her hostage and attacked her husband with a hammer of federal charges of attempted kidnapping and assault.

The jury deliberated for about eight hours before finding David DePape guilty of attempted kidnapping of a federal official and assault on the immediate family member of a federal official.

He faces up to 50 years in prison.

The attack on then-82-year-old Paul Pelosi that was captured on police body camera video just days before last year’s midterm elections sent shockwaves through the US political scene.

DePape, 43, admitted during trial testimony that he broke into the Pelosis’ home on October 28, 2022 intending to hold Nancy Pelosi hostage and “break her kneecaps” if she lied to him.

He also admitted to bludgeoning Paul Pelosi with a hammer after San Francisco police officers showed up at the home, saying his plan to end what he viewed as government corruption was unravelling.

Defence lawyer Angela Chuang told jurors during closing arguments that DePape was caught up in conspiracies.

She said he was motivated by his political beliefs, not because he wanted to interfere with Nancy Pelosi’s official duties as a member of Congress, making the charges against him invalid.

During her rebuttal, prosecutor Helen Gilbert said the defence had made a false distinction between the California Democrat’s politics and official duties and that DePape did not differentiate between the two.

DePape, a Canadian citizen who moved to the US more than 20 years ago, also is charged in state court with assault with a deadly weapon, elder abuse, residential burglary and other felonies.

Defence trial date will be set during a November 29 hearing, a spokesperson for the San Francisco District Attorney’s Office said.

Defence lawyer Jodi Linker argued that DePape believed “with every ounce of his being” that he was taking action to stop government corruption, the erosion of liberty in the United States and the abuse of children by progressive politicians and actors.

During his testimony, DePape echoed online conspiracy theories and told jurors he had planned to wear an inflatable unicorn costume and record his interrogation of Nancy Pelosi to upload it online.

Prosecutors say he had rope and zip ties with him.

Detectives also found body cameras, a computer and a tablet.

DePape testified that his plan was to get Nancy Pelosi to admit that she had been lying to the US public.

“If she lied, I would break her kneecaps,” he said.

“The choice is on her.”

He said he would then move to other targets, including a women’s and queer studies professor who testified at the trial, California governor Gavin Newsom, actor Tom Hanks and US President Joe Biden’s son Hunter Biden.

Paul Pelosi also testified, recalling how he was awakened by a large man bursting into the bedroom door and asking, “Where’s Nancy?”

He said that when he responded that his wife was in Washington DC, DePape said he would tie him up while they waited for her.

“It was a tremendous sense of shock to recognise that somebody had broken into the house and looking at him and looking at the hammer and the ties, I recognised that I was in serious danger, so I tried to stay as calm as possible,” Pelosi told jurors.

Pelosi recounted how he managed to call 911 with DePape looking on, urging Pelosi to tell police that he was a friend.

Pelosi said he tried to tell police what was happening without aggravating DePape.

– AAP