In late September, President Donald Trump issued an executive order calling antifa a "domestic terrorist organization."Experts say the order is on shaky legal grounds, antifa — short for anti-fascist — is more of an ideology than an organization.Still, the Trump administration appears eager to prosecute those it labels antifa.A 2021 case involving alleged antifa supporters in Pacific Beach could gain new significance on the national level. We discuss the details.Guest:Alex Riggins, federal courts and federal law enforcement reporter, The San Diego Union-Tribune