for blocking muslims all together. >> donald j. trump is calling for a total and complete shut down of muslims entering the united states until our country's representatives can figure out what the hell is going on. >> reporter: like trump -- >> when mexico sends his people, they're not sending their best. they are bringing drugs, they're bringing crime, they're rapists. >> reporter: cruz also has a history of making jarring remarks. once saying that accepteding obamacare was akin to apiecing the nazis during world war ii. >> we saw in britain, chamberlain who told the british people accept the nazis and in america there were troyse voices that listened to that. >> reporter: and taking a flip approach to a question about contracepti contraception. >> last i checked we don't have a rubber shortage in america. >> reporter: neither of these candidates are strangers to sparring with their republican establishment. but tonight at a campaign event in las vegas it was clear that donald trump...