Undocumented is the politically correct term for illegal aliens.
We’re not supposed to say illegal aliens anymore. That is analogous to the “N” word for black people.
For now, we’re still allowed to say illegal immigrants, but not illegal aliens.
Soon, we will not be allowed to say illegal immigrants, which is where the softer PC term, undocumented, comes in.
In controlling the language, the liberals are changing the status of this group of people from being here illegally, to simply missing documents.
Hey, haven’t you ever lost a driver’s license before? You were undocumented then. To liberals, it’s the same thing as just not having your ID, but no question about legal status.
Apparently, "anchor baby" is out too. I don't think there's a preferred alternative either.