The leader of a congressional panel warned Tuesday he would use “every tool” to get Los Angeles Mayor Karen Bass to testify after she skipped a hearing that put L.A.’s homeless services system in the hot seat.

It came as multiple audits, reviews and court rulings have found L.A. has failed to ensure proper tracking of large-scale spending on homeless services — particularly through the joint city-county L.A. Homeless Services Authority, known as LAHSA. Much of the money is federal dollars authorized by Congress.

Bass had declined to testify at Tuesday’s hearing, saying she was unavailable and that it would be a “politically motivated” attack. Her public schedule showed she planned to attend a groundbreaking of a shopping and community center in the Pacific Palisades two hours after the hearing was set to start.