Good Sunday morning. CNN's Kevin Liptak posts the letter President Obama left President Trump on Inauguration Day: "Congratulations on a remarkable run. Millions have placed their hopes in you, and all of us ... should hope for expanded prosperity and security during your tenure. ... [W]e are just temporary occupants of this office. That makes us guardians of those democratic institutions and traditions — like rule of law, separation of powers, equal protection and civil liberties — that our forebears fought and bled for. ... Good luck and Godspeed, BO." Read the letter.

And a bulletin: Treasury Secretary Mnuchin tells "Fox News Sunday" Harvey funds must be tied to raising debt ceiling.