They can sue.
Now they likely can't sue the Congresscritters because, alas, the Constitution says they can't be sued for what they say in Congress, on Congress, etc.
McClatchy's reporters and managers simply forgot they aren't members of Congress.
William Douglas, race-huslter, and James Rosen are the names of the reporters from McClatchy. You can google them up and read all about them.
But a lawsuit can help get the fraud out front for the innoncent sheeple who still follow these “news” outlets.