The U.S.'s largest nurses union has accused Hillary Clinton campaigners of deceiving Democratic voters in Nevada at Saturday's caucuses by wearing red t-shirts that people typically identify with their union. Now the union is suggesting that Senator Bernie Sanders, who it endorsed for president, request U.N. election observers. Union spokesperson Chuck Idelson said that the red tees were not a first for Clinton supporters and that when nurses attending the caucuses pointed out the Clinton people to the press, they immediately changed back into Clinton campaign blue tees.