(CNN) The numbers for the 2010 census are out, and the news appears good for Republican-leaning states when it comes to adding new seats in the House of Representatives. The U.S. Constitution mandates that a census be conducted every 10 years to reflect the population shifts in the country accurately. The new numbers spell out congressional reapportionment as the states divvy up the 435 seats in the House. Tuesday's findings showed a growing population in Western and Southern states -- areas where Republicans tend to do well. According to U.S. Census Bureau figures: • Eight states will gain House members, including Arizona, Florida, Georgia, Nevada, South Carolina, Texas, Utah and Washington. • Ten states will lose members in the House, including Illinois, Iowa, Louisiana, Massachusetts, Michigan, Missouri, New Jersey, New York, Ohio and Pennsylvania. Then-candidate Barack Obama won eight of those states in 2008. • Thirty-two states saw no gains in seats, including California. The solid blue state still has the largest congressional delegation with 53 seats.