Trump's campaign baffles the mind. If you need to attack someone's family the candidate can't have his finger prints on it, at all. Yet Trump has been attacking people's families for months, from Bush's mom to Cruz's dad and wife. It doesn't make any sense, and while he got away with it in the primary it's not something that will work in a general election. Let your surrogates and aides do the dirty work/plant stories with sympathetic press.
As with the judge, I'd imagine Trump will be forced to release some type of statement soon. But we haven't reached that point yet. I think he's going to attack Khan again, just as he kept attacking the judge. He'll double down, republicans will react in disgust...and then he'll quietly release the "semi apology" statement.