I think there certainly could be aliens out there. Maybe some have died out or some are advancing to explore. I don't think they come here to analy probe us or cut up cows. I agree with r Hawking, if they come here we are fucked.
Would they be considered immigrants or aliens. If they would vote for liberals than they would be welcome immigrants especially if they bring their family members to also vote.
*Remember if an ID is required it is Racist, they wouldn't be required to show ID to vote.
If they would start shooting liberals with their ray guns then they wouldn't be welcome and allowed in.