WASHINGTON (AP) — Secretary of State Antony Blinken on Monday defended the Biden administration's much-criticized handling of the military withdrawal from Afghanistan in a contentious congressional hearing.

Appearing before the House Foreign Affairs Committee, Blinken faced complaints from angry lawmakers about the administration's response to the quick collapse of the Afghan government and, more specifically, the State Department's actions.

Republicans savaged the response as "a disaster" and "a disgrace" while even Democrats allowed that the entire operation could have been handled better.

The State Department has come under heavy criticism from both sides for not doing enough and not acting quickly enough to get American citizens, legal residents and at-risk Afghans out of the country after the Taliban took control of Kabul on Aug. 15. Some seeking to leave remain there, although Blinken could not provide a number.

"This was an unmitigated disaster of epic proportions," said Rep. Michael McCaul of Texas, the top Republican on the committee. He said the abrupt withdrawal along with leaving some Americans and Afghans behind had "emboldened the Taliban" and other U.S. adversaries. "I can summarize this in one word: betrayal."

His GOP colleague Steve Chabot of Ohio was even more blunt. "This is a disgrace," he said.

The chairman of the committee, New York Rep. Gregory Meeks, urged his colleagues to keep politics out of their criticism. But he acknowledged that there had been problems. "Could things have been done differently? Absolutely," he said.

In the first of two days of congressional testimony, Blinken tried to calmly deflect allegations of unpreparedness by noting that the Biden administration had inherited a U.S.-Taliban peace deal from its predecessor, along with a languishing program to grant visas to Afghans who had worked for the U.S. government.

Blinken, who had publicly predicted in June that a complete Taliban takeover would not happen "from a Friday to a Monday," also tried to pre-empt criticism of the prediction by noting that no one in the U.S. government expected the Afghan government to fall as quickly as it did.

"Even the most pessimistic assessments did not predict that government forces in Kabul would collapse while U.S. forces remained," Blinken said in prepared remarks released ahead of his appearance. He also defended the evacuation effort, saying it succeeded despite near insurmountable odds.

"The evacuation was an extraordinary effort – under the most difficult conditions imaginable – by our diplomats, military, and intelligence professionals," he said. "In the end, we completed one of the biggest airlifts in history, with 124,000 people evacuated to safety."

But Republicans, in particular, have been demanding answers as to why American citizens were left behind in the chaotic days and weeks before the military completed its withdrawal on Aug. 30.

In a preview of GOP questions, the Republican National Committee released a statement earlier Monday with the banner headline "Fire Blinken," demanding that he be held to account for what it described as a litany of failings.

"Blinken's disastrous handling of Afghanistan and weak leadership put American lives in danger, including the lives of Americans still trapped in Afghanistan," the GOP committee said.

Blinken is very close to President Joe Biden and his job as America's top diplomat is almost certainly safe, but criticism of the administration's handling of the Afghanistan withdrawal has not been limited to Republicans.

Numerous Democrats have also questioned the policy and expressed concern about stranded Americans, green card holders and Afghans who could face retaliation from the Taliban because of their work or ties to the U.S. government over the past 20 years.

State Department officials have acknowledged that the congressional hearings could be contentious and possibly ugly, but many remain convinced the U.S. military and other officials did the best they could under extremely trying circumstances — including the evacuation of the U.S. Embassy in Kabul and the crush of thousands of desperate people at Kabul's airport seeking to leave the country.