WASHINGTON (AP) — Homeland Security Secretary Kristi Noem defended her department’s immigration enforcement tactics in front of a Senate committee on Tuesday and pushed back against criticism from Democrats who say she wrongly disparaged two protesters killed by federal officers in Minneapolis earlier this year.

It was Noem’s first congressional appearance since the shooting deaths of the two protesters galvanized widespread opposition to how the Trump administration is executing its mass deportation agenda, a centerpiece policy of President Donald Trump’s second term. At the time, Noem portrayed the protesters, two U.S. citizens, as agitators, although accounts from local officials and bystander video contradicted assertions from her and other administration officials.

In one exchange, retiring Republican Sen. Thom Tillis of North Carolina called her leadership a “disaster” and skewered her handling of the immigration crackdown and her management of emergency response.