NEW: Bret Baier asks Kamala Harris when she first noticed Joe Biden was mentally unstable after Harris tried claiming Trump was mentally unstable.
Kamala: Trump's not stable.
Baier: When did you first notice Biden wasn't stable?
Brutal.
NEW: Bret Baier asks Kamala Harris when she first noticed Joe Biden was mentally unstable after Harris tried claiming Trump was mentally unstable.
Kamala: Trump's not stable.
Baier: When did you first notice Biden wasn't stable?
