KEY POINTS
  • Maryland launched a court challenge on Tuesday to the legality of President Donald Trump's appointment of Matthew Whitaker as acting U.S. attorney general, saying the president overstepped his constitutional authority and broke federal law.
  • Trump installed Whitaker as acting attorney general last week after ordering Jeff Sessions to resign from the post.
  • Democrats in Congress have voiced concern that Whitaker, a Trump loyalist, could undermine or even fire Mueller.
Matt Whitaker 

The state of Maryland launched a court challenge on Tuesday to the legality of President Donald Trump's appointment of Matthew Whitaker as acting U.S. attorney general, saying the president overstepped his constitutional authority and broke federal law.

Trump installed Whitaker as acting attorney general last week after ordering Jeff Sessions to resign from the post. Trump had repeatedly criticized Sessions for recusing himself in March 2017 from the federal investigation, now headed by Special Counsel Robert Mueller, into Russia's role in the 2016 U.S. election, a probe Trump has called a "witch hunt."