House Democrats are preparing to subpoena a central witness in the impeachment inquiry into President Donald Trump after he bowed to a State Department order to skip a deposition on Tuesday.

Gordon Sondland, Trump’s ambassador to the European Union, had been expected to testify Tuesday morning as part of an expanding impeachment probe by three House committees related to Trump’s efforts to press Ukraine to investigate former Vice President Joe Biden. Trump endorsed the decision to block Sondland’s testimony in a tweet, accusing Democrats of running a “kangaroo court.”

Read the rest of the story at Politico.