(CNN)One year ago this week, Ted Cruz became the first of 17 candidates to argue that he could unite the Republican Party behind him. Now, he has his a chance to prove it. On the anniversary of a presidential launch that knew nothing of a man by the name of Donald Trump, contests and converts won of late will offer the clearest signal yet of whether he can indeed consolidate the anti-Trump movement and eventually defeat the billionaire front-runner. Cruz is favored to win this Tuesday's caucuses in Utah and is hopeful of sweeping the state's 40 delegates by eclipsing...