The House is expected to pass a bill Tuesday that would establish a commission to study the roots of homegrown terrorism.

A National Commission on the Prevention of Violent Radicalization and Homegrown Terrorism would examine and report on the cause of the problem and collaborate with federal, state or local security authorities in studies of ideologically motivated violence.

The bill (HR 1955) includes no authorization of funds for the commission.

Jane Harman, D-Calif., chairwoman of the Homeland Security Subcommittee on Intelligence, Information Sharing and Terrorism Risk Assessment, said it is “crucial to understand who and how someone could become radicalized to the point of inflicting mass casualties on their neighbors and communities.”

The commission would issue a report to Congress within 18 months with recommendations for immediate and long-term countermeasures to domestic terrorism.

The bill also would establish a Center of Excellence for the Study of Violent Radicalization and Homegrown Terrorism in the United States. It would assist federal, state and local homeland security officials through training, education and research in preventing homegrown terrorism. The center also would investigate and conduct original research on the origins, dynamics and social and psychological aspects of such terrorism.

The bill would require the Homeland Security secretary to conduct a survey of methodologies implemented by foreign nations to prevent domestic terrorism and report the findings to Congress.

The House Homeland Security Committee approved the bill by voice vote Aug. 1. The bill had also been referred to the Judiciary Committee, but the committee discharged it and sent it straight to the House floor for a vote.