BRIGHTON, Colo. (AP) — Republican activists gathered in a school lunchroom last month to hear political pitches from candidates and agreed on the top issue in the Denver suburbs these days: immigration.

The area has been disrupted by the arrival of largely Venezuelan migrants coming north through Mexico, they said. Virtually everyone in the meeting said they were uncomfortable with the new population, which has overwhelmed public services and become a flashpoint in local and national elections.

“We’ve lived here our whole lives, and now we have to pay for hotels and debit cards and health care” for the migrants, through government spending, said Toni Starner, a marketing consultant. “My daughter’s 22 and she can’t even afford to buy a house.”

Some 1,200 miles to the south, migrants are also transforming the prosperous industrial city of Monterrey, Mexico. Haitian migrants speak Creole on downtown streets and Central American migrants ask motorists for help at intersections.