Republican presidential candidate Ted Cruz said on Sunday that the protesters at rival Donald Trump's rallies are behaving "abusively and wrong," but added that it doesn't help when the GOP front-runner encourages violence. "At the end of the day in any campaign, responsibility starts at the top," the Texas senator said on NBC's "Meet the Press" on Sunday. "And it is not beneficial when you have a presidential candidate like Donald Trump telling his supporters, 'Punch that guy in the face.' We ought to have a president who brings us together, who doesn't seek to divide us." Cruz said on...