WASHINGTON–A House committee will hear testimony today from an Iraqi legislator alleged by other Iraqi legislators and by American military officers to have played a role in last April’s suicide bombing of his own parliament.

Testifying before the House Foreign Affairs Subcommittee on International Organizations, Human Rights and Oversight will be Khalaf al-Ulayyan, one of the heads of the Sunni Arab alliance known as Tawafuq or Sunni Accord Front. The New York Sun reported in May 2007 that American and Iraqi security forces raided the home of Mr. al-Ulayyan in Yarmouk, Baghdad on April 3, 2007, and found stores of TNT that matched the kind used in the suicide belt that detonated on April 12 at the Iraqi parliament’s cafeteria. That blast killed a member of parliament, Mohammed Awad, a Sunni Arab member of Mr. al-Ulayyan’s coalition.

Mr. al-Ulayyan has denied the charge. He has avoided prosecution from Iraq’s justice ministry so far because as a member of parliament he is immune to prosecution. In August Mr. al-Ulayyan opted out of the government after a power sharing agreement was reached in Baghdad by Sunni, Shiite and Kurdish leaders, saving Prime Minister Maliki’s coalition.

Mr. al-Ulayyan confirmed the raid on his home last year in interviews to the Arabic media and at the time demanded an apology from Prime Minister Maliki.

Another independent member of parliament reached in Baghdad yesterday by telephone, Mithal al Alusi said Congress was either “stupid or naïve” in inviting Mr. al-Ulayyan to testify. The man who personally invited him is Rep. William Delahunt, a Democrat of Massachusetts who has in the past been an outspoken defender of the Venezuelan strongman, Hugo Chavez. Mr. al-Ulayyan will testify with Nadim Al-Jaberi, another member of parliament who opposes the American troop presence in Iraq.

A press release on the event describes Mr. al-Ulayyan as “a member of the Iraqi Parliament, founder of the National Dialogue Council, (a nationalist Sunni Islamist political party), and representative of the Sunni Accord Front. Sheikh Al-Ulayyan is an influential tribal leader. He is against sectarian politics and partitioning and stresses the importance of ending the U.S. occupation of Iraq. He supports a strong central Iraqi government and nationalized energy sector.”

A spokesman for Mr. Delahunt said the congressman did personally invite Mr. al-Ulayyan and Mr. al-Jaberi. The spokesman declined to comment further in advance of the event.

Mr. al-Alusi says Mr. al-Ulayyan harbored a former culture minister, As’ad Kamal al-Hashemi, who was charged last June by an Iraqi court with ordering the murder on February 8, 2005 of al-Alusi’s two sons Ayman and Jamal. After the charges were made public, the Iraqi police had chased the former minister into the American protected international zone, where he was believed to have stayed at the al-Rashid Hotel.

Mr. al-Ulayyan’s district is from Khallediyah in the heart of Anbar province. The next provincial elections are likely to result in Mr. al-Ulayyan’s party losing power.

The son of Iraq’s president and an Iraqi diplomat here, Qubad Talabani, said of Mr. al-Ulayyan: “This man has very little legitimacy on the ground. He has a very small, infantile following. He is not a player in Iraqi politics.”

A spokesman for the Republican House leader, John Boehner of Ohio, Michael Steel, said that the invitation to the Messrs. al-Ulayyan and Jaberi was an insult to the American military.

“It sounds as though Representative Delahunt, like too many in his party, is so desperate to cling to the illusion that our armed forces are being defeated in Iraq that he is willing consort with the lowest of the low,” he said. “Based on our best information, these men are crooks, liars, and enemies of the United States of America, and they are not even in the Iraqi government. They have no place in the U.S. Capitol. Their presence is an insult to our Armed Forces and our entire nation.”