Washington, D.C. ? Kansas Sen. Jerry Moran has resigned from the Eisenhower Memorial Commission after serving for 13 years as one of the original lawmakers overseeing the effort to build a memorial in Washington honoring the late President Dwight D. Eisenhower.

The commission announced Moran’s resignation late Tuesday. A spokeswoman for Moran did not immediately return a phone call and email seeking comment.

Millions of dollars have already been spent on securing a location near the National Mall and developing a design by architect Frank Gehry for a memorial park. It was supposed to be built by now but has been delayed amid a campaign against Gehry’s design and objections from Eisenhower’s family.

In June 2013, Moran called on the commission to endorse Gehry’s design, and the panel voted unanimously to move forward.