The only Vietnamese-American ever elected to the U.S. Congress has lost his seat.Anh “Joseph” Cao admitted defeat with a graceful concession speech Tuesday evening, saying he had done his best for his district and was proud of his efforts. He promised a smooth handover to his successor, Cedric Richmond.Cao represented the Republican Party, which made large gains elsewhere across the country. But he was running in a majority-Democratic district.Cao, a former immigration lawyer, won his seat two years ago at a time when President Barack Obama was leading the Democrats to major gains. His competitor at the time had been caught in a corruption scandal – Voanews