Sen. Ted Cruz (R-Texas) is calling for legal action against Portland Mayor Ted Wheeler (D) over his apparent failure to adequately police his city.

Wheeler has reportedly directed Portland law enforcement to employ a "hands-off" policy during city protests, even when they turn violent. The alleged policy has allowed many demonstrators to be injured when masked Antifa protesters turn violent.

"To federal law enforcement: investigate & bring legal action against a Mayor who has, for political reasons, ordered his police officers to let citizens be attacked by domestic terrorists," Cruz said on Twitter Sunday.

Cruz's call for an investigation came after Antifa protesters ignited violence during demonstrations in Portland on Saturday, resulting in the targeted beating of journalist Andy Ngo.

Ngo was hospitalized Saturday evening for injuries sustained during the brutal beatdown, including a brain bleed, his attorney said.

Meanwhile, conservative commentator Michelle Malkin launched a GoFundMe campaign to help Ngo with his medical bills. By Sunday afternoon, the campaign surpassed more than $110,000 in donations.

Richard Grenell, the U.S. ambassador to Germany, said he has requested the Department of Justice investigate the incident.