President Trump said that former White House counsel Don McGahn and other former administration officials should not testify before Congress in a Fox News interview on Thursday.

Driving the news: McGahn, a key witness from the Mueller report, was subpoenaed to appear before the House Judiciary Committee on May 21. Attorney General Bill Barr canceled his scheduled appearance before the committee on Thursday, which caused House Democrats to consider holding him in contempt of Congress.

What he's saying: In the interview, Trump said "they've testified for many hours, all of them. I would say, it's done ... they shouldn't be looking anymore."

The big picture: Trump's White House has moved to a strategy of simply ignoring congressional subpoenas, highlighting a key limitation of congressional oversight — there's not much Democrats can do if the Trump administration says no to everything. And attempts to hold members of previous administrations in contempt of Congress all fizzled, setting the stage for protracted legal battles.

Go deeper ... Scoop: Former White House counsel Don McGahn off the record