He’s there at the invitation of the current president who’s doing an election campaign for his party, leading to parliamentary elections on Dec 17.

The way they got in touch is through a celebrity who is a member of the political party in question.

How is Woz going to help him I don’t know, probably boasting that rich and famous want to become Serbians due to their policies.

Edit: those qualifiers like “left-wing”, “right-wing”, “progressive” can be ignored due to being meaningless. The party happens to be called “Serbian Progressive Party” when translated to English