"the carpet-baggers' solicitude for Negro emancipation"
A famous 1872 cartoon of a carbet-bagger
Public DomainA famous 1872 cartoon of a carbet-bagger

"Carpetbagger" is a pejorative term which was used by the inhabitants of the southern states to refer to the influx of opportunist businessmen from the northern states after the Civil War.  These men formed alliances with freed slaves but were widely believed to be manipulating these people in order to maximise the profit they could make from the south, in whatever legitimate or unscrupulous way presented itself.