Is he incorrect? No. It’s a truth you can ignore all you like.
Yes! There was an entire "Birther" and anti-birthright citizenship movement for years. Where do you think regular conservatives gained so much knowledge about the 14th amendment, natural born citizens, and everything else?
When Cruz calls this stuff "left wing" propaganda, he belittles a large chunk of conservatives who, apparently, have more knowledge about the Consitution on this subject than the so-called constitutional scholar.
Levin makes the same mistake when he rails against most of his own audience. We'll be seeing his ratings taking a hit soon, along with Cruz's poll numbers.