Byron York writes:

What is the status of his old proposal to deport all immigrants who are in the United States illegally? After days of Trump and his senior advisers talking about it, the answer is entirely unclear.
The fundamental problem vexing Team Trump is that the deportation proposal was never really clear. Yes, Trump said it often last year, but he also pointedly left it out of many immigration discussions, as well. It went largely unnoticed, for example, that when Trump posted an immigration position paper on his campaign website last year, it had a lot about a border wall and enhanced enforcement — and nothing at all about mass deportations.

Immigration has been the Trump campaign’s central issue, but that doesn’t mean the candidate has bothered to think it through.