Farfield, Iowa (CNN)The stakes for Ted Cruz heading into the Iowa caucus are getting higher. Donald Trump's decision to skip Thursday's Fox News Channel Republican debate puts Cruz in the spotlight -- for better or worse. Should Cruz do well and end up winning Iowa, he'll have momentum heading into contests past New Hampshire. But should he lose, he may never be able to break through as GOP voters look elsewhere for an anti-Trump candidate. A growing number of Cruz's campaign donors, allies and associates are considering what the road ahead would look like should the Texas senator lose to...