Sen. Ted Cruz (R-Texas) fired back on Saturday after Republican presidential front-runner Donald Trump launched a lengthy, furious tweetstorm at him. Cruz reportedly suggested that Trump´s attacks came in response to a new poll that showed him losing in a head-to-head competition with the senator. "That has got to drive him nuts, and I imagine it sent him out of bed this morning tweeting and tweeting and tweeting," Cruz said, according to The Texas Tribune and other outlets. Cruz then reportedly said Trump´s behavior wouldn´t be appropriate for a "commander in chief."