LAS VEGAS (AP) — Tuesday night's Nevada caucuses force a critical test on the Republican Party's leading presidential candidates.
Ted Cruz is fighting to prevent his campaign from spiraling out of contention.
Marco Rubio is fighting to prove he can build on his recent momentum.
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And Donald Trump, with his rivals locked in a battle for second, is fighting for a third straight victory. If he wins, he will expand his delegate lead, which could soon become insurmountable.
Says Rubio: "I think it's the most unpredictable of all the races we've had so far."
