First of all, nobody is saying he did it single handedly.
In 2014 it was universally accepted that Cruz was instrumental in defeating amnesty. He publicly criticized it every step of the way from 2013 to 2014. He publicly criticized Cantor and the rest of the leadership. The issue of amnesty was central to Brat’s election. The reason it was even a topic of discussion was because Cruz was working so hard to kill it. When it ultimately failed, Cruz was applauded by the conservatives. He was shunned by the mushy Republicans. He was denigrated by the media. He was attacked by the Democrats. It was universally understood that he had a huge hand in it’s failure.
Jeff Sessions (-the Trump backer, Luircin), who is unarguably the grand master of opposing amnesty, credits Cruz for being instrumental.
I guess you geniuses here in 2016 know better than everybody back in 2014. Congratulations.
Jeff Sessions said that Brat defeating Cantor is what stopped amnesty. It’s in the Breitbart link.
Cruz didn’t lift his littlest finger to help Brat. He didn’t give Brat’s campaign one thin dime. If he was campaigning so hard against amnesty, he’d have campaigned against Cantor.
But he didn’t.