Photos:: Nevada Republican caucuses

Trump greets the audience before his victory speech.

Trump in Las Vegas. He has now won three states in a row in the GOP nominating contest.

Trump supporters at his Las Vegas rally celebrate his Nevada victory.

Trump supporters in Las Vegas.

Donald Trump greets supporters at a caucus site in Las Vegas.

Ted Cruz talks with voter Greg Gerhardt at a Reno caucus location.

Marco Rubio, who appeared earlier in the day in Las Vegas, campaigns in Kentwood, Mich.

Ohio Gov. John Kasich, focusing ahead on the election calendar, speaks at a town hall meeting at Kennesaw State University in Kennesaw, Ga.

Voters line up to caucus in Reno.

Caucus workers give instructions at a Las Vegas site.

Donald Trump signs an autograph for a supporter at a caucus site in Las Vegas.

Ted Cruz with voter Mark Gonda outside a Reno caucus site.

Donald Trump speaks at a rally at the Nugget Casino Resort in Sparks, Nev.

Donald Trump greets supporters following his rally in Sparks.

Trump at the Nugget in Sparks.

Sen. Ted Cruz speaks at the Boys & Girls Club of Truckee Meadows in Reno.

Ted Cruz greets supporters after his Reno rally.

Sen. Marco Rubio speaks at a campaign event at the Silverton Casino in Las Vegas.

Marco Rubio at the Silverton Casino in Las Vegas.