It is, however, worth noting that historically unions were virulently anti-immigrant, seeing them as competitors who lowered wages. Their change in stance is r

It is, however, worth noting that historically unions were virulently anti-immigrant, seeing them as competitors who lowered wages. Their change in stance is relatively recent and largely involuntary because their attempts to suppress immigration collapsed. Given the anti H1-B sentiment often displayed in various places, should any of the foreign-born here trust that a software developer union would remain pro-immigration? I wouldn't; there's too much historical precedent.