Here is one big counter-example: The Service Employees International Union, or SEIU, a union with two million members in the US. They call for comprehensive immigration reform tied with labor conditions. Teachers' unions like the American Federation of Teachers and the National Education Association also call for compassionate immigration reform.

The old stereotype of nativist unions is just that. It's true in some cases--see the Teamsters, who also supported Trump, or police unions--but the actual union movement in the US has long fought for better treatment for immigrants.

https://www.seiu.org/cards/solutions-for-immigration-reform-...