In a Facebook post after Collins announced her plans to vote for Kavanaguh during a lengthy speech on the Senate floor, the veteran anchor called the nomination battle a "devastating loss" for "most women" and some men.
"So Collins misses her moment to be a hero, and the old bulls win again," Rather wrote in the post.
"For most women and many men it’s a bitter, devastating loss. Which makes it all the sweeter for the old bulls, and for the forces of power, privilege and money everywhere," he added.
Rather wrote that his wife was "furious and deeply disappointed" by the day's news that Republicans have the votes necessary to confirm Kavanaugh on Saturday.