But, born here? Or not born here?
Anyhow, "criminals" is a way too vague concept for expelling someone from a country, especially when your party could come to power and criminalize anything you want.
And, Show me the man and I'll show you the crime: most people commit something illegal relatively frequently, sometimes without even realizing that it could be (e.g. copyright violations, libel, slight violations of obscure little-known laws...).
They'll typically never face consequences for that; but if you target them, or if it becomes more interesting for law enforcement to find any violation of the law on the part of someone, more often than not something will be found.