For two females, you would have to implant one egg’s DNA into a sperm whose DNA was “stripped out” And for two males, the same but transferred into an egg. I’d say it could be done in the near future with the progress we did with CRISPR in the last decade, for instance.
I prefer the French Left take on the idea. They did a campaign awhile back titled: “The fascists are voting, are you?” With a big portrait of the most well-known far right politician in the country. In the end they had to pay a 3000€ fine but I’d say it was worth it.