US appeals court judges on Friday appeared skeptical about broad legal arguments made by President Donald Trump's administration in seeking to block former White House Counsel Don McGahn from testifying to a congressional committee as part of the impeachment effort against Trump.The case was being heard by a three-judge panel of the US Court of Appeals for the District of Columbia Circuit.

In the initial exchanges, two of the three judges questioned the administration's arguments that the House committee has no legal standing to enforce its subpoena and that there is broad presidential immunity that applies to efforts to seek testimony from close advisers. Arguments were continuing. Judge Thomas Griffith, a Republican appointee, and Judge Judith Rogers, a Democratic appointee, both asking probing questions of Justice Department lawyer Hashim Mooppan.