Because they didn’t want to
C. How can I be a slave in a land where slavery does not exist?
In the case of Dred Scott, he was brought by his owner to the north. When there, he sued for his freedom, claiming that now that they were in a free state, his owner did not have the right to still 'own' him, since it was illegal in the state. However, the judge ruled that property continued to stay as property regardless of where the property is located at.
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The ways that the cartoonist expressed his opinion was by several ways.The cartoon suggests that the progressive party wants to end the bad things found in the society that are being ignored by the mainstream parties that are similar to blind alleys.This was one way on how the cartoonist showed expresses on his opinion and the other ways is, The cartoonist shows that he supports their endeavors to end these many wrongs.
I hope this helps