In a letter to Secretary of State Blinken, Ernst and her colleagues write: “Since reestablishing control of Afghanistan, the Taliban resumed the same murderous and oppressive habits that characterized their leadership tenure prior to the arrival of U.S. forces in 2001. 

"Even as the administration concluded the withdrawal of U.S. and allied forces from Afghanistan, we saw public attacks on individuals, beatings of women and girls, and search teams actively pursuing allies and partners. Most concerning to us is that among those beaten and chased by Taliban forces were American citizens and their families still living in Afghanistan.”
 

They go on to say: “The Taliban appointed Sirajuddin Haqqani, the leader of the Haqqani network and a known terrorist wanted by the FBI for the murder of American citizens, as Interior Minister and allowed terror organizations to join the government. 

"Given their history of supporting terror attacks on the United States, their brutal style of governance, their continued display of atrocities against Americans and our allies, and now, their enhanced military capability, the current version of the Taliban government presents a significant threat to the United States…We believe the Taliban easily meets all three criteria and urge you to consider designating the Taliban as a foreign terrorist organization and treating them as such to the maximum extent of the law.”

The Taliban captured power in Afghanistan on Aug 15 after entering capital Kabul city.