Entrance polls for the Nevada caucus show late deciders broke for Marco Rubio.
In good news for Trump, a majority of voters described themselves as angry. More from CNN:
GOP caucus-goers are extremely unhappy with the federal government, according to CNN's readout of the polls: 58 percent told pollsters they were angry, while a further 36 percent said they were dissatisfied. Just 1 percent said they were enthusiastic about the federal government's performance, while 4 percent were satisfied.