Sen. Markwayne Mullin said he regretted calling Alex Pretti “deranged” but stopped short of offering a direct apology to Pretti’s family.

“I shouldn’t have said that,” the Oklahoma Republican said during his confirmation hearing Wednesday to serve as the next Homeland Security secretary. He was referring to his past comments regarding the U.S. citizen killed by federal immigration enforcement agents in Minnesota back in January, who some conservatives in the immediate aftermath labeled a “domestic terrorist.”

It was a stronger concession than Mullin gave just moments earlier, when he refused to apologize for calling Sen. Rand Paul (R-Ky.), the chair of the Homeland Security and Government Affairs Committee, a “snake.” Still, when pressed by the committee’s top Democrat, Sen. Gary Peters of Michigan, Mullin would not commit to apologizing to Pretti’s family until the conclusion of an investigation into the incident.

“If I’m proven wrong, then I will,” Mullin said.

Regarding Renee Good, another U.S. citizen killed by immigration enforcement officers in Minnesota earlier this year, Mullin refused to retract comments he made at the time of Good’s death, specifically that agents were justified in killing her. He told BLN in January that agents “had the right to defend themselves.”

He said he would wait for the findings of the investigation into Good’s killing to comment further; Sen. Richard Blumenthal (D-Conn.) countered that the Trump administration is currently blocking state and local inquiries.

A committee vote on Sen. Markwayne Mullin’s confirmation as Homeland Security secretary remains on track for Thursday despite a fiery sparring session Wednesday between the Oklahoma Republican and Sen. Rand Paul of Kentucky, the chair of the panel that must approve his nomination.

A spokesperson for Paul said after the tense exchange — during which Mullin refused to apologize for comments saying he “understood” why Paul was violently assaulted in 2017 — that the committee vote “is on for tomorrow.”

As chair of the Homeland Security and Governmental Affairs Committee, Paul has wide latitude to schedule action on Mullin’s nomination.

Massachusetts Sen. Elizabeth Warren is wading into Michigan’s closely contested Democratic Senate primary, backing state Sen. Mallory McMorrow over two rivals.

It’s a somewhat counterintuitive endorsement for the progressive U.S. senator who has made her backing of Medicare for All a core part of her political identity. McMorrow opposes Medicare for All, while Abdul El-Sayed, one of McMorrow’s opponents, supports it.

But the endorsement is a coup for McMorrow as she seeks to win over the progressive wing of the party in her bid to succeed retiring Democratic Sen. Gary Peters. McMorrow has now secured endorsements from four senators — with Warren joining Chris Murphy of Connecticut, Martin Heinrich of New Mexico and Peter Welch of Vermont — more than opponents El-Sayed and Rep. Haley Stevens.

Warren said in a statement her relationship with McMorrow goes back nearly a decade.

“I remember first calling Michigan State Senator McMorrow after she flipped a Republican-held seat in 2018, and I was immediately inspired by her ideas, her plans, and her fight to make a real difference,” she said. “Mallory is both a fighter and a winner, and I’m proud to endorse her because she’s the proven leader Michigan needs in the United States Senate.”