He'll be removed according to the US Constitution. Be immediately impeached. He must be impeached, no gray area anymore according to the construction of the USC.
SHALL = Will happen. Must happen.
SHALL is NOT: Should
He must be removed according to the USC:
"High crimes and misdemeanors" is a phrase from Section 4 of Article Two of the United States Constitution: "The President, Vice President and all civil Officers of the United States, SHALL be removed from Office on Impeachment for, and Conviction of, Treason, Bribery, or other high Crimes and Misdemeanors."
Hey... I didn't write the thing!
A convicted felon definitely fits this definition.