I remember him making that remark early on. It was never ‘specified’. His immigration plan is ‘specified’ in writing. You’re playing loose with words.
Your Breitbart link refers to a ‘remark’ from last summer. Trump has never put it into writing. They were off the cuff remarks.
Trump has since put into writing that all H1B workers will be paid 110% of the prevailing wage for the job category they are in. That will force employers to seek American employees first. Trump is all about putting Americans first.