Political map of the United States, 1850

For fellow lovers of historical maps:

"Designed to exhibit the comparative area of the free and slave states and the territory open to slavery or freedom by the repeal of the Missouri Compromise (wiki) with a comparison of the principal statistics of the free and slave states, from the census of 1850."

Click here to embiggen.

And this one is a map of the popular vote from 1880 (embiggen here):

Related: 

From 1803, The Ottoman Empire's First Map of the Newly Minted United States.

Map: How Fast You Could Travel Across the US in the 1800's.

More old US maps here.