Russian socialite-turned-journalist-and-activist Ksenia Sobchak has staged her first press conference since last week's surprise announcement that the former "It Girl" with 5.3 million Instagram followers is bidding to unseat her late father's former protégé at Saint Petersburg city hall - that’s Vladimir Putin. Is she a serious challenger to Russia's incumbent president next spring? Or a convenient foil in a race where - officially for now - the only credible challenger is barred from running? Produced by Daniel BARNEY, Selina SYKES and Chris DAVIS.