President Donald Trump on Saturday publicly excoriated his attorney general in a series of tweets about the Russian investigation, describing Jeff Sessions as “scared stiff and Missing in Action.” Sessions has recused himself from the investigation into the Trump campaign’s contacts with Russia. The probe is being overseen by Deputy Attorney General Rod Rosenstein, who hired Special Counsel Robert Mueller after Trump fired FBI Director James Comey last year. Trump’s latest comments come 10 days after the president sparked a major controversy by criticizing Mueller and publicly stating that Sessions “should stop this Rigged Witch Hunt right now.” At the time, White House Press Secretary Sarah Sanders insisted that Trump’s comments did not constitute obstruction of justice and that they were merely the president’s opinion, not orders for Sessions.