When police discovered Tuesday the body of Mollie Tibbetts, a University of Iowa student who had been missing for weeks, it shocked her small Iowa town.

For conservatives, news of Tibbetts’ death — particularly that police had arrested an undocumented immigrant from Mexico in connection with her murder — quickly became the latest evidence that the nation’s immigration laws and border security are weak, an argument they have repeated often in the runup to the 2018 midterms.

Read more at PBS News.