They wanted free labors for the poor and no harm out of the factories
Tenement I think that's the answer
Either a primary source could be unavailable or a primary source could be extremely biased. For example, if a researcher was looking at King George, they might not want to use the diary of someone who despised King George as a big part of their research.
The Northern Democratic Party was a leg of the Democratic Party during the 1860 presidential election. It was when the party split in two due to problems with slavery. Stephen A. Douglas was the nominee and lost to Abraham Lincoln.