On October 10, 2018, the US Department of Homeland Security (DHS) issued its long-anticipated proposed rule on inadmissibility on public charge grounds. Under the proposed rule, US Citizenship and Immigration Services (USCIS) officers would consider receipt of cash benefits and, in a break from the past, non-cash medical, housing, and food benefits in making public charge determinations. This focuses on the potential effect of the proposed rule on two populations, undocumented immigrants and nonimmigrants that would otherwise be eligible for legal permanent resident (LPR) status based on a legally qualifying relationship to a US citizen or LPR living in their household. This CMS report analyzes how these populations in 2016 would have fared under the proposed rule. After placing the rule in historic context, the paper profiles these two populations and examines the characteristics that would mitigate in favor of and against their inadmissibility. The study offers a snapshot of these two groups based on estimates derived from the 2016 American Community Survey (ACS).