Russia concludes presidential candidate registration with Putin and three others

Russia completes registration for presidential election; includes Putin as expected winner and 3 politicians supporting Ukraine conflict. Boris Nadezhdin, prominent anti-war candidate, disqualified due to flawed signatures. Approved nominations: Vladislav Davankov, Leonid Slutsky, Nikolai Kharitonov. Putin running as independent, widely expected to secure victory. Nadezhdin challenges decision in Supreme Court.