Of course the only attacks on Cruz's citizenship have come from Trump.
This is Trump yesterday on New Hampshire 1 TV news. The political director Paul Steinhauser is interviewing Trump and says, “Mr. Trump, I want to ask you about Ted Cruz and your comments, because his birthplace is in Canada, it may be ‘precarious’ for the Republicans to have a nominee like that. Are you suggesting or questioning his birthright, his citizenship?”
TRUMP: No, I’m not at all. I just know that it’s being questioned all over, and a lot of people are asking me that question. I hope it’s not so. I hope it doesn’t come about. But people are worried that if he wasn’t born in this country — which he wasn’t, he was born in Canada, and he actually had a Canadian passport along with a US passport until just recently. So I don’t know what it all means. I know that other people are talking about it.