Panda is trending because the White House hosted a Halloween party and President Biden trotted around with the First Lady dressed as a giant panda. The President also bit a small baby dressed as a chicken and photos of that were trending too.
Jimmy Kimmel is trending for making a joke about how Trump supporters should vote late, suggesting their votes not be counted. Jokes of this nature were targeted by the U.S. government for suppression on Twitter during the 2020 election. One user, Douglass Mackay, made a joke like this and found himself the subject of all manner of subpoenas.
Buzz Aldrin is trending for releasing this statement endorsing Donald Trump for president.