Though nationalism and suspicion seems to 'trump' solidarity across national borders.
... capital and materials flow freely across borders, labor cannot.
Of course our far-right - through the decades from the John Birch Society to Trump - has been consumed by worry about 'open borders' for labor that do not exist in reality in North America. Just the thought of it sends them into spasms of conspiracy theory. Witness the
North American Union.
To some extent Europe has gone down this path of permitting the mobility of labor on a continental - though not global - basis. The results have largely been positive - though there are problems with this policy too - with a lot of backlash from the European far-right like Le Pen, Wilders, Farage and others (their versions of Trump and the Birch Society).