Washington( CNN) The Justice Department has agreed to allow congressional investigators to interview a key FBI employee believed to have served as the main contact, or “handler” of, former British intelligence agent Christopher Steele, who compiled the so-called “dossier” of allegations about President Donald Trump’s connections to Russia, according to a department spokesperson.

Shortly after 8 p. m. Wednesday, President Donald Trump burnt off a tweet taking aim at the Justice Department and FBI — this time accusing his top law enforcement agencies of stymieing the Intelligence Committee’s Russia probe.

Fox News had just aired a report indicating a senior advise for House Intel Committee Chairman Devin Nunes had recommended he engage “contempt of Congress citations” against the top leadership at the Justice Department and FBI due to their purported failure to comply with subpoena requests regarding the dossier.