EMBARGOED UNTIL 5 AM WASHINGTON—As his presidency comes to a close, Joe Biden penned a farewell letter to the American people, reflecting on his four years in office and his decades of public service. “It has been the privilege of my life to serve this nation for over 50 years,” Biden wrote, marking the end of a political journey that brought him from Scranton to the Oval Office. “Nowhere else on Earth could a kid with a stutter from modest beginnings in Scranton, Pennsylvania, and Claymont, Delaware, one day sit behind the Resolute Desk in the Oval Office as President of the United States,” Biden wrote. “I have given my heart and my soul to our nation. And I have been blessed a million times in return with the love and support of the American people.”…