Here is proof that John Keats is a classical humanist Republican who supported the American Revolution: He wrote a poem to Thaddeus Kosciusko who was a General in the American Revolution (He actually used his knowledge in engineering to defeat the Brits) and this is what he says.
To Kosciusko
GOOD Kosciusko, thy great name alone
Is a full harvest whence to reap high feeling;
It comes upon us like the glorious pealing
Of the wide spheres - an everlasting tone.
And now it tells me, that in worlds unknown,
The names of heroes, burst from clouds concealing,
And changed to harmonies, for ever stealing
Through cloudless blue, and round each silver throne.
It tells me too, that on a happy day,
When some good spirit walks upon the earth,
Thy name with Alfred’s, and the great of yore
Gently commingling, gives tremendous birth
To a loud hymn, that sounds far, far away
To where the great God lives for evermore.