I can understand the Abascal reference, as Seymour and him have similar philosophies. I do not understand EK's reference to Sanchez though: since Seymour supports this candidate he is definitely right-wing, while Pedro Sanchez is a socialist.
Well, I don’t want to start a flame war about spanish politics, but it could be said that although being on different sides of the political spectrum around here some/many people see Abascal and Sánchez as both being kinda dubious, or even sleazy, characters (as many other politicians from any country, lol); much like Seymour and this Peter Prestley seem to be.
But it could be simpler than that, of course, and just reference material: like Anderson Cooper was in GGGB. Or Abella Danger and Nancy A here.
Or a little spanish easter egg, like the City Hall from Avilés (a small city in the north of Spain which was used as a model for some backgrounds).
EDIT: