House can subpoena former White House counsel Don McGahn to testify, appeals court rules

A divided US Court of Appeals for the District of Columbia Circuit said McGahn's refusal to testify is grounds for the House to sue.

The ruling is a win for Congress as a whole, emphasizing that it can sue to take an administration to court when there's a standoff between the branches, and a loss for the Trump administration's attempt to expand executive powers.

But in letting McGahn continue to challenge the subpoena on other grounds, the practical impact is that the court case is ongoing and he may not have to testify before the election.

This story is breaking and will be updated.