Budapest's mayor withdraws from the opposition primary, leaving two candidates to battle over who will take on Prime Minister Viktor Orban in elections next year. At a joint press conference held on Kossuth Square, Gergely Karacsony, 46, says he will be endorsing the conservative Peter Marki-Zay, a provincial city mayor, in the runoff round that starts on Sunday and will run through October 16. IMAGES AND SOUNDBITES