"There are really no words for how I feel this morning. America has spoken. I really thought we were better than this. Guess not," the 68-year-old author wrote in a post titled "President P**ygrabber."
"Trump was the least qualified candidate ever nominated by a major party for the presidency. Come January, he will become the worst president in American history, and a dangerously unstable player on the world stage," he added. "And the decimated Democrats, a minority in both House and Senate, do not have the power to hinder him."