WASHINGTON — The chairman of the House Foreign Affairs Committee on Thursday subpoenaed President Trump’s top negotiator for Afghanistan, complaining that the administration had stonewalled lawmakers’ attempts to get a straight story about its strategy for bringing the war there to an end.

The subpoena, the first authorized by Representative Eliot L. Engel of New York since Democrats took control of the House, compels Zalmay Khalilzad, the special representative for Afghanistan reconciliation, to publicly brief lawmakers at a hearing on the administration’s plan.

It came in the aftermath of Mr. Trump’s revelation that he had been planning, but then abruptly canceled, peace talks with the Taliban at Camp David, and his subsequent declaration that the negotiations were “dead.”

“More than 2,000 American troops have died in Afghanistan, and I’m fed up with this administration keeping Congress and the American people in the dark on the peace process and how we’re going to bring this long war to a close,” Mr. Engel said. “For months, we haven’t been able to get answers on the Afghanistan peace plan, and now the president is saying the plan is dead.”