More and more apartment landlords and operators are starting to feel the strain placed on their portfolios by the Trump administration's intensifying immigration enforcement actions. Immigration actions, including detentions and deportations, have meant some tenants simply vanish from their units. The extent to which immigration enforcement actions and policy shifts affected the multifamily sector surprised Finnigan, who researches the residential rental market. As immigration enforcement actions ramped up, apartment landlords and operators have sought advice on how to handle it — and data to explain its impact, Finnigan said. But the main effect of the immigration crackdown on multifamily has been the way it has changed some tenant behavior, Finnigan said.