NASA Astronaut Kate Rubins Votes From Space - TMZ

Kate Rubins just cast the mother of all mail-in ballots -- she's not even on Earth and she still cast her vote!!!

and Kate voted using a secure electronic ballot generated by the Harris County Clerk's office and uplinked by Mission Control.

Astronauts have been legally allowed to vote from space since 1997, and Kate also cast her ballot from the ISS in the 2016 election.