NEW YORK (CBSNewYork) – Ted Cruz has rolled out a new radio ad blasting Bill de Blasio ahead of Tuesday’s New York primary.

The Republican candidate for president has long criticized de Blasio’s policies, but the radio ad is his most pointed attack yet.

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“De Blasio’s socialist policies are tearing this city apart,” the ad says. “Murder’s up nearly 10 percent. He treats cops like criminals and criminals like freedom fighters.”

You can listen to the ad entirely in the YouTube clip above.

The ad attacks de Blasio for making New York a sanctuary city for illegal immigrants and criticizes the decision to end the controversial stop and frisk policy.

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“Now [de Blasio] is meddling in the Republican primary, campaigning against Cruz,” the ad says. “Because when Cruz is president, de Blasio is done.”

The ad alludes to the FBI investigation of two businessmen who have ties to de Blasio’s campaign. Jeremy Reichberg and Jona Rechnitz both served on de Blasio’s inaugural committee and either donated or raised money for him, CBS2’s Marcia Kramer reported.

“Cruz will instruct the Justice Department to hold corrupt politicians accountable. Maybe that’s why de Blasio fears Ted Cruz,” the ad says.

“I hold myself and my administration to the highest standard of integrity,” de Blasio said Monday. “We are very, very careful about doing things in a legal and appropriate manner. We’re very, very careful about disclosing the support we get. We disclose everything, and we welcome questions about it.”

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Less than a week before the New York primary, Cruz is currently third in the polls behind GOP front runner Donald Trump and Ohio Gov. John Kasich.