Shortly after being released from jail, Peter Navarro, a former Trump advisor, speaks at a GOP convention.

 Former Trump White House adviser Peter Navarro spoke at the Republican National Convention on Wednesday, just hours after his release from a Miami federal prison, where he served a four-month sentence for defying a subpoena from the January 6 congressional committee.

“I have a simple message for you: if they can come for me, if they can come for Donald Trump, be careful. They will come for you,” Navarro warned attendees in Milwaukee, where his former boss was formally nominated as the 2024 GOP presidential candidate.

Navarro is one of two Trump associates convicted for failing to comply with subpoenas from the now-defunct House select committee investigating the January 6, 2021, attack on the US Capitol. Trump adviser Steve Bannon began serving his four-month sentence earlier this month at a federal prison in Connecticut.

During his time in prison, Navarro, who is in his 70s, worked as a law library clerk, according to his prison consultant Sam Mangel. "Everybody has to work," Mangel said. "It gave him a chance to write." Navarro was reportedly well-liked and respected by fellow inmates. "When I went to visit him, guys were coming up to him, high-fiving him," Mangel added.

Navarro concluded his speech at the convention by inviting his fiancée to join him onstage: "This is my beautiful girl. She did the time with me." He ended with a rallying call: "Now here’s the sweetest thing that’s going to come off my lips: Vote Trump-Vance ’24 for Trump 47."

Defying the Subpoena

Lawmakers had sought Navarro’s participation in their probe into Trump’s election subversion schemes, pointing to reports of his involvement in efforts to delay Congress’ certification of the 2020 presidential results and his own account of election-related plots in his memoir.

After just a few hours of deliberation, a federal jury found Navarro guilty last summer on two counts of contempt: for failing to produce documents and for not showing up for an interview demanded by the committee.

Navarro had argued that he was acting under Trump's direction, who had invoked executive privilege, when he refused to comply with the subpoena. However, the judge barred him from presenting that defense, concluding that Navarro had not provided sufficient evidence that Trump had formally asserted the privilege.

Navarro’s emergency appeal to delay his prison sentence was unsuccessful, but he is now appealing his conviction on its merits.

The federal correctional facility where Navarro had been since March is one of the oldest prison camps in the country, housing fewer than 200 inmates in aging infrastructure with a large Puerto Rican population.

This story and headline have been updated.