Some guy is abusing his girlfriend. She is undocumented. The classic move here by scum like that is to threaten to have her deported, scaring her enough to keep her in line and allow him to keep abusing her. Under Obama, such threats had no power behind them (although for far too many cases, they probably worked.)
Under President Bannon, they will be carried out.
Immigration agents detain domestic-abuse victim in court
Republicans for decades now falsely claim to be the party of "family values." It is and has always been complete bullshit. And also the Christian right, whom like Putin, view Trump as a useful idiot and continue to back a White House with white supremacist Steve Bannon at the helm.