Update: Trump has dominant win in Nevada; takes 14 delegates

With a big win in Nevada, Donald Trump claimed a third straight commanding victory in the race for the Republican presidential nomination. A tight race for second between Marco Rubio and Ted Cruz offered little evidence that Republicans were ready to coalesce around one strong alternative to the businessman billionaire.With victories now under his belt in the West, the South and Northeast, a gleeful Trump was oozing even more confidence than usual Tuesday night that the GOP nomination is within