WASHINGTON — House Republicans have issued a subpoena demanding testimony from Secretary of State Antony Blinken as they wrap up a sprawling yearslong investigation into the chaotic U.S. withdrawal from Afghanistan in August 2021.

Rep. Michael McCaul, the chairman of the House Foreign Affairs Committee, sent a subpoena letter late Tuesday ordering Blinken to appear before the committee by Sept. 19 or face a contempt of Congress charge.

“You served as the final decision maker for the department on the withdrawal and evacuation,” McCaul wrote.

He added that three years later, Blinken is "in a position to inform the Committee’s consideration of potential legislation aimed at helping prevent the catastrophic mistakes of the withdrawal, including potential reforms to the Department’s legislative authorization.”

Matthew Miller, a State Department spokesman, said Blinken is unable to testify on the dates proposed by the committee as he will be traveling for diplomatic work the majority of September. He claimed the committee denied “reasonable alternatives” to the subpoena date.

“The Secretary has testified before the Congress on Afghanistan more than 14 times — more than any other Cabinet-level official,” Miller said, adding that four of those times were directly before the Foreign Affairs committee at the request of McCaul. “It is disappointing that instead of continuing to engage with the Department in good faith, the Committee instead has issued yet another unnecessary subpoena.”

The subpoena for Blinken's testimony is the latest in a series of moves by McCaul and other House Republicans over the last 18 months to hold the Biden administration accountable for what they have called a “stunning failure of leadership” after Taliban forces seized the Afghan capital of Kabul, far more rapidly than U.S. intelligence had foreseen as American forces pulled out.

The committee is expected to summarize its work in an investigative report to be released Monday, amid the contentious presidential election where Republican nominee Donald Trump has tried to elevate the withdrawal from Afghanistan as a campaign issue.

While the GOP report is expected to place blame on President Joe Biden and Vice President Kamala Harris, who is now the Democratic nominee for president, independent watchdog reports over the last three years have documented a much more nuanced and bipartisan case for which administration was at fault.

A 2022 report by the Special Inspector General for Afghanistan Reconstruction, or SIGAR, concluded it was decisions made by both President Donald Trump and Biden to pull all U.S. troops out of Afghanistan that were key factors in the collapse of that nation’s military.

That report mirrors assertions made by senior Pentagon and military leaders in the aftermath of the withdrawal. Military leaders have made clear that their recommendation was to leave about 2,500 U.S. troops in the country, but that plan was not approved.

___ Associated Press writer Matthew Lee contributed to this report.