Before Donald Trump took office, he promised that he would crack down on illegal immigration like no other president had before. Over the past year, he has followed through with this promise in a huge way.

Fox News reported that Trump’s Immigration and Customs Enforcement head spoke out on Wednesday to say that he’ll “never back down” from safeguarding the border. While speaking at the Border Security Expo in San Antonio, Texas, ICE Director Thomas Homan called out sanctuary cities and the ongoing congressional debate over so-called “Dreamers.”

“If we get a clean DACA bill, shame on all of us,” Homan said, referring to Barack Obama’s Deferred Action for Childhood Arrivals program. “You can’t address DACA and reward people that brought children here illegally and not address underlying reasons of DACA.”

Homan went on to say that he “100 percent support[s] the wall,” added that he is “sick and tired of the vilification of the men and women of ICE and the Border Patrol.”

“If you violate the laws of this country, if you enter illegally, which is a crime, it’s not going to be OK anymore,” Horman said.

Homan explained that sanctuary cities endanger federal officers because they often force agents to make arrests in homes and workplaces, rather than controlled environments, like state jails.

“They [sanctuary cities] bankroll the very criminal organizations that have killed Border Patrol agents and killed special agents in ICE,” Homan said. “It irritates me that a politician who has never held a badge and a gun, who doesn’t understand what we do every day, makes a decision of putting their own political careers ahead of the health and safety of a law enforcement officer. A shame!”

This comes months after California Governor Jerry Brown signed SB54, which enacted a statewide sanctuary law. Liberal supporters of the bill said that it allows undocumented immigrants to cooperate with local police and seek education, health care and other public services without worrying they will expose themselves to possible deportation. ICE Director Thomas Homan wasn’t having any of it, however, as he said that the federal government would not allow California to be “a sanctuary state for illegal aliens,” and would have no choice but to “conduct at-large arrests in local neighborhoods and at worksites, which will inevitably result in additional collateral arrests, instead of focusing on arrests at jails and prisons where transfers are safer for ICE officers and the community.”

At the beginning of January, Homan warned that “California better hold on tight” and that if local politicians “don’t want to protect their communities, then ICE will.”

When asked about the upcoming operation, ICE spokesman  James Schwab said that the agency “doesn’t comment on future or current operations.”

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