The top Democrat on the House Oversight and Government Reform Committee said Monday he had run out of patience with the Defense Department and wants to subpoena it for documents on hurricane relief operations in Puerto Rico and the U.S. Virgin Islands last year.

The committee opened a review in October of the response to Hurricanes Irma and Maria. But Rep. Elijah Cummings, D-Md., wrote a letter Monday to the committee’s Republican chairman, Rep. Trey Gowdy, R-S.C., urging him to pursue the subpoena after what he called an “inadequate” response so far that produced some email documents in December.