... or was just naive about the hideous complexity of US immigration law.
I mention this one (reported at vox.com) because it is current in the news and that it might raise issues for the Trump campaign. I am not going to even try to wind my way through the various visa categories. You can do that here. However, I will say that this might be another opportunity for the Trump campaign to get ahead of the story and do a thorough review and publicly announce the results to stop media speculation. You know where that leads: Trump hasn't disclosed his tax returns, so why ... etc., etc.