You're going back to 1812? How about history today? So far four states have been denied making voting harder for minorities. The gerrymandering today comes from Republicans. Wisconsin, North Carolina, Texas, et al. 
https://www.washingtonpost.com/news/wonk/wp/2014/05/15/americas-most-gerrymandered-congressional-districts/
If you have to go back two hundreds to prove Dems gerrymander, I think you've already lost the argument.