H.R. 7959, known as the "Safeguarding Homes from Illegal Entry, Living, and Dwelling Act" or the "SHIELD Act," seeks to amend the Immigration and Nationality Act by making certain actions related to squatting a basis for inadmissibility and deportability of aliens....
Simple Explanation
The SHIELD Act wants to change the rules so that people from other countries who break into and live in places they're not supposed to can be told they can't stay here anymore. If someone admits to doing this or gets in trouble for it, they might be asked to leave, no matter how big or small the trouble was.