Hillary Clinton
The "Jimmy Kimmel Live!" host also suggested a way to remove the president from the White House once and for all.
Kamala Harris has become the first woman, first Black person and first Asian American to be elected vice president of the United States.
After being mocked on Twitter, the president claimed his "sources" told him it was true.
"It's a spooky time filled with demons and darkness," warned Jim Carrey's Joe Biden in the Halloween cold open.
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The former vice president is competitive in all the battleground states Trump won in 2016 as the president desperately seeks reelection.
The Senate majority leader joined other prominent Republicans in taunting the former presidential nominee over Amy Coney Barrett's confirmation.
The CNN commentator is "having some alarming flashbacks" to the 2016 election.
She slammed Peggy Noonan's sexist take on the vice presidential candidate, but said it was encouraging to see how much backlash it created.
"Never underestimate their capacity for petty hatred," one person hit back on Twitter.
The 2016 Democratic nominee recalled her ominous prediction from the past to slam Donald Trump.