Although city officials say thousands of Haitian migrants in Springfield, Ohio, are “legal,” the reality of their legal status is nuanced.

Businesses needed workers, and Haitians, many already authorized to work, heard living costs were low. But the newcomers have strained resources, and that has fueled tension.

Last week’s presidential debate thrust Springfield, Ohio, into the national spotlight, prompting people to wonder how a Haitian community has taken root there — and why. Here’s a look at some key questions,