BuzzFeed News reported that the letter was first circulated in September 2017, but then-Democratic presidential candidate Hillary Clinton shared the letter as it went viral in June 2016.
The letter can be read in full below:
"Dear Bill, When I walked into this office just now I felt the same sense of wonder and respect that I felt four years ago. I know you will feel that too.
"I wish you great happiness here. I never felt the loneliness some presidents have described.
"There will be very tough times, made even more difficult by criticism you may not think is fair. I'm not a very good one to give advice; but just don't let the critics discourage you or push you off course.
"You will be our president when you read this note. I wish you well. I wish your family well.
"Your success now is our country's success. I am rooting hard for you.
"Good luck --
George"
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