The State Department did not immediately respond to a request for comment. Engel has been threatening to sue for documents since May, when Johnson’s probe began to grow.
Johnson said a report on his findings could be released this summer, and his board is also trying to get testimony from national security officials and the Obama’s top administration’s diplomatic services. He denied that his investigation was intended as a political plan or was influenced by foreign interests trying to harm Biden.
Last year, the House instructed President Donald Trump to insist that Ukrainian leaders investigate Biden and other Democrats, as well as refusing to provide security assistance during the war with Russia.
Trump̵7;s allies have responded with leveling discredited allegations that Biden pressured Ukraine to fire a prosecutor who was investigating Burisma, the energy company his son Hunter served on the council. During the impeachment proceedings, the heads of the State Department testified that Biden’s work in Ukraine was being carried out in accordance with the agency’s policy, and that efforts to remove the prosecutor were part of an international push to eradicate corruption. They also noted that the prosecutor himself was an obstacle to the investigation of Burism.
More recently, leading Democrats have cited intelligence that suggests that at least some efforts against Biden are being stepped up by Kremlin Ukrainians seeking to interfere in the 2020 election.
Speaker Nancy Pelosi and Democratic Senate leader Chuck Schumer have called for a comprehensive FBI congress on intelligence, which they say shows that a particular foreign plan affects Congress’ actions.
After attending a general election security briefing, Pelosi blew up the administration on Friday morning for “withholding” evidence of foreign interference.