Fire the person.
Tell everyone in the Administration to turn in their resignations and they will only be considered to remain if they pass a lie detector test. Anyone refusing will be terminated. Time to drain the swamp in the West Wing.
If this is true, it's not nearly enough.
Arrest, indict, try and hang...
Drawing and quartering, followed by a wooden stake just to be sure.
Trump should also adopt the Kenyan strategy...
Ignore Congress, the Federal Courts, warm up his phone and his pen, ignore any sunpoenas, issue Executive Orders with the force of law (A la the Kenyan) and let 'er rip.
Mr President, tens of millions of us have your back.
Just say when.