Orange County, California — once considered a conservative holdout in the blue state — has been electorally swept by Democrats in the midterm elections, coinciding with the region’s booming foreign-born populations.

Until the midterm elections, four of Orange County’s six congressional districts were held by Republicans, including Rep. Dana Rohrabacher (R-CA) and Rep. Mimi Walters (R-CA).

In the midterms, though, Democrats swept Orange County with wins in all six congressional districts, turning the region blue. At the same time of Democrat dominance in the county, the foreign-born population is booming to record levels with the majority of foreign residents arriving from Latin America and Asia.

California’s 46th District, already a Democrat-held congressional seat, has a foreign-born population that is now reaching 40 percent with four-out-of-ten residents being born outside the United States.

The other Democrat-held congressional seat in Orange County, California’s 47th District, has a foreign-born population of nearly 30 percent.

Three of Orange County’s four Republican districts that have flipped to Democrat have foreign-born populations that make up 25 percent or more of the region. For example, California’s 39th District — where Democrat Gil Cisneros won over Republican Young Kim — has a 34.1 percent foreign-born population.

In the 45th District, where Rep. Mimi Walters (R-CA) has conceded to Democrat Katie Porter, the foreign-born population makes up nearly 30 percent of the district.

Similarly, in the state’s 48th District, Rep. Dana Rohrabacher (R-CA) — the former speechwriter to President Ronald Reagan — lost to Democrat Harley Rouda after serving in the seat since 2013. That district’s foreign-born population is now near 25 percent.

Even in the 49th District, where the foreign-born population remains below 20 percent, Democrat Mike Levin beat out Republican Diane Harkey. The district has anywhere between an 18 to 19 percent foreign-born population with about 55 percent of foreign-born residents arriving from Latin America and nearly 30 percent coming from Asia.

As Breitbart News reported, districts with some of the largest foreign-born populations — like New York’s 14th, Minnesota’s 5th, and Massachusetts’ 7th District — elected some of the most far-left, open borders candidates to Congress.