Trump is "out of touch with reality," Reid declared after the president again pushed Georgia's Republican governor to nullify voters' decision backing Joe Biden.
The former Senate leader has been among the most high-level political voices favoring to end the 60-vote threshold for legislation.
"There's more than one up there," the former Senate majority leader says in the new UFO documentary "The Phenomenon."
Navy officials confirmed the videos' existence last fall while insisting at the time that the footage should never have been made public.
The endorsement from the former Senate majority leader comes after Biden's sweeping win in the South Carolina primary.
The former senator also endorsed his diverse home state to become the first in the nation to hold a presidential contest in the primary cycle.
The former Senate Democratic leader says Trump is going to be a lot more formidable than his rivals might think.
“The future of our country is sacrificed at the altar of the filibuster," the former Senate majority leader wrote in a New York Times op-ed.
The former Senate majority leader said it wasn't a matter of if the legislative tactic would end but "a question of when."
The former Senate Democratic leader said it was important to move forward to give Americans "a view of what's going on."