WASHINGTON -- The chairman of the House Oversight Committee is asking for further delay in approving the planned Dwight D. Eisenhower Memorial near the National Mall in Washington.

California Rep. Darrell Issa sent a letter Thursday to the Eisenhower Memorial Commission saying more questions must be answered about the design process for the memorial before it's approved.

The project has slowed amid objections from Eisenhower's family to the layout and focus of the memorial.

Issa says he hasn't received answers from the General Services Administration about how architect Frank Gehry was chosen to design the memorial.

Issa is also a member of the National Capital Planning Commission, a panel that must approve the design before construction can begin. He says he won't support the design until there is a thorough examination.

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  • Eisenhower Memorial Design Revisions

    Architect Frank Gehry's model of the Eisenhower Memorial is viewed in on Capitol Hill in Washington, Tuesday, May 15, 2012, before a meeting of the Eisenhower Memorial Commission. Designers from Gehry's firm unveiled some changes to a planned memorial honoring President Dwight D. Eisenhower in Washington after hearing complaints from members of Eisenhower's family.

  • Eisenhower Memorial Design Revisions

    Daniel J. Feil, executive architect of the Eisenhower Memorial Commission, right, talks with Susan Banes Harris, who chairs the Commission's architecture committee, as they look over architect Frank Gehry's model of the Eisenhower Memorial before a meeting of the Eisenhower Memorial Commission on Capitol Hill in Washington, Tuesday, May 15, 2012. Designers from architect Frank Gehry's firm unveiled some changes to a planned memorial honoring President Dwight D. Eisenhower in Washington after hearing complaints from members of Eisenhower's family.

  • Eisenhower Memorial Design Revisions

    Architect Frank Gehry's model of the Eisenhower Memorial is viewed on Capitol Hill in Washington, Tuesday, May 15, 2012, before a meeting of the Eisenhower Memorial Commission. Designers from architect Frank Gehry's firm unveiled some changes to a planned memorial honoring President Dwight D. Eisenhower in Washington after hearing complaints from members of Eisenhower's family.

  • Eisenhower Memorial Commission

    The revised design, with statues.

  • The previous design, with bas reliefs.

  • The previous design, with bas reliefs.

  • The previous design, with bas reliefs.

  • The previous design, with bas reliefs.