The US House of Representatives Foreign Affairs Committee subpoenaed Secretary of State Antony Blinken on Tuesday, saying he had refused to appear before the panel to testify on the US withdrawal from Afghanistan in August 2021. In a letter about the subpoena, Chairman Michael McCaul said Blinken must appear before the committee on Sept. 19 or face contempt charges, the committee said. State Department spokesperson Matthew Miller said Blinken was not currently available to testify on the dates proposed by the committee, but has proposed “reasonable alternatives” to comply with McCaul’s request…