Software pioneer John McAfee is making his second straight bid for the Libertarian Party’s presidential nomination, but he faces a few logistical challenges. Among them: Not being able to campaign on American soil.

McAfee was the runner-up for the 2016 Libertarian nomination, losing to former New Mexico Gov. Gary Johnson, had served in that office as a Republican. There’s a limited amount of campaigning he can do since he is currently facing arrest for tax evasion charges in the United States.