SEIU nurses call on CNA to stop attacks on unionized nurses. Service Employees International Union, May 8, 2008 Las Vegas - With the outcome of an election held May 6 and 7 among 1,000 nurses over union representation at three Las Vegas hospitals yet to be determined, Service Employees International Union (SEIU) nurses are renewing their call for an end to the divisive actions of the California Nurses Association. The CNA's months-long campaign of lies and false promises failed to capture enough votes to lure nurses away from SEIU. With 400 votes for CNA, 377 for SEIU, and 26 for no union, neither organization obtained the 50 percent of all votes required to win. ... SEIU