Republican lawmakers are warning President Trump not to interfere with the probe into Russian meddling in the 2016 US presidential election.
It follows a series of tweets from Donald Trump attacking the investigation led by Special Counsel Robert Mueller.
The White House is already under fire over the dismissal of deputy FBI Director Andrew McCabe just days before he was due to retire.
Reporter in Washington, Steve Mort, says Mr Trump appears to ramping up hostilities as investigators hone in on key figures close to the president.
IN: "The words…
OUT: … Capitol Hill"
DUR: 25 seconds
CLIP: http://www.fsnradionews.com/feeds/0318Mueller-Mort1.mp3
ALT: Reporter in Washington, Steve Mort, says senior Republican Senator Lindsey Graham has warned any move to oust Mueller would be "the beginning of the end" of the Trump administration.
IN: "It's not…
OUT: … investigation unimpeded"
DUR: 15 seconds
CLIP: http://www.fsnradionews.com/feeds/0318Mueller-Mort2.mp3
ALT: Reporter in Washington, Steve Mort, says leading Republicans in Congress are concerned that firing the Special Counsel might trigger a crisis.
IN: "Jeff Flake…
OUT: … been defending"
DUR: 26 seconds
CLIP: http://www.fsnradionews.com/feeds/0318Mueller-Mort3.mp3