You can read a good overview of the American labor movement and unions as a political force right here in The Atlantic.
And you can read Langston Hughes’ poem from 1935: “America Is Not America to Me” (full text here; this is from near the end).
I am the poor white, fooled and pushed apart,
I am the Negro bearing slavery’s scars.
I am the red man driven from the land,
I am the immigrant clutching the hope I seek-
And finding only the same old stupid plan
Of dog eat dog, of mighty crush the weak.
I am the young man, full of strength and hope,
Tangled in that ancient endless chain
Of profit, power, gain, of grab the land!
Of grab the gold! Of grab the ways of satisfying need!
Of work the men! Of take the pay!
Of owning everything for one’s own greed!
I am the farmer, bondsman to the soil.
I am the worker sold to the machine.
I am the Negro, servant to you all.
I am the people, humble, hungry, mean-
Hungry yet today despite the dream.
Beaten yet today-O, Pioneers!
I am the man who never got ahead,
The poorest worker bartered through the years.
Yet I’m the one who dreamt our basic dream
In the Old World while still a serf of kings,
Who dreamt a dream so strong, so brave, so true,
That even yet its mighty daring sings
In every brick and stone, in every furrow turned
That’s made America the land it has become.
O, I’m the man who sailed those early seas
In search of what I meant to be my home-
For I’m the one who left dark Ireland’s shore,
And Poland’s plain, and England’s grassy lea,
And torn from Black Africa’s strand I came
To build a “homeland of the free.”
Who said the free? Not me?
Surely not me? The millions on relief today?
The millions shot down when we strike?
The millions who have nothing for our pay?
For all the dreams we’ve dreamed
And all the songs we’ve sung
And all the hopes we’ve held
And all the flags we’ve hung,
The millions who have nothing for our pay-
Except the dream that’s almost dead today.
O, let America be America again-
The land that never has been yet-
And yet must be–the land where every man is free.
The land that’s mine–the poor man’s, Indian’s, Negro’s, ME-
Who made America,
Whose sweat and blood, whose faith and pain,
Whose hand at the foundry, whose plow in the rain,
Must bring back our mighty dream again.