(Saul Loeb | Pool Photo via AP, file) In this Sept. 27, 2018, file photo, then-White House counsel Don McGahn listens as Supreme court nominee Brett Kavanaugh testifies before the Senate Judiciary Committee on Capitol Hill in Washington. A federal judge has ordered McGahn to appear before Congress in a setback to President Donald Trump’s effort to keep his top aides from testifying. The outcome could lead to renewed efforts by House Democrats to compel testimony from other high-ranking officials, including former national security adviser John Bolton.