LAS VEGAS, Nevada (Reuters) - While many viewers were fixed on the ongoing political spectacle that is Donald Trump during Tuesday's Republican presidential debate, Ted Cruz and Marco Rubio only had eyes for each other.
The two first-term senators - one from Texas and the other from Florida, both the 44-year-old sons of Cuban fathers and both rising conservative stars in the party - made it evidently clear that they see the other as the primary obstacle to securing the nomination if Trump, the current front-runner, falters.