The first article you link has the following explaining their stance on immigration [0]:
“This approach will ensure that immigration does not depress wages and working conditions or encourage marginal low-wage industries that depend heavily on substandard wages, benefits and working conditions.”
And:
(1) an independent commission to assess and manage future flows, based on labor market shortages that are determined on the basis of actual need;
(2) a secure and effective worker authorization mechanism;
(3) rational operational control of the border;
(4) adjustment of status for the current undocumented population; and
(5) improvement, not expansion, of temporary worker programs, limited to temporary or seasonal, not permanent, jobs.
“This approach will ensure that immigration does not depress wages and working conditions or encourage marginal low-wage industries that depend heavily on substandard wages, benefits and working conditions.”
And:
(1) an independent commission to assess and manage future flows, based on labor market shortages that are determined on the basis of actual need;
(2) a secure and effective worker authorization mechanism;
(3) rational operational control of the border;
(4) adjustment of status for the current undocumented population; and
(5) improvement, not expansion, of temporary worker programs, limited to temporary or seasonal, not permanent, jobs.
[0]: https://aflcio.org/resolution/labor-movements-principles-com...