(ANSA-AFP) - BRUXELLES, APR 20 - European Commission chief Ursula von der Leyen on Monday congratulated Bulgarian parliamentary election winner Rumen Radev, an EU critic who has called for renewing ties with Russia. "Bulgaria is a proud member of the European family and plays an important role in tackling our common challenges," she said. "I look forward to working together, for the prosperity and security of Bulgaria and Europe." (ANSA-AFP).