Ted Cruz on Tuesday suggested that GOP rivals Marco Rubio and Ben Carson should drop out of the presidential race if they don’t win a state on Super Tuesday. The Texas senator, who's positioning himself to be the alternative to Donald Trump, called on his opponents to unite behind one candidate to take on the GOP front-runner. Both the Florida senator and retired neurosurgeon have yet to win a state. “If tomorrow morning, a candidate is sitting there and he’s won zero states and doesn’t have a credible shot at getting the delegates, then I do think it’s worth a...