Since its a Node.js app, wouldn't it be better to use LESS or Stylus instead of forcing the developers to install Ruby and Compass? Bootstrap supports LESS out of the box.

I'd love to change this to LESS or Stylus if you'd like.

Labels should show party name and possibly the party image. Data can be found in:
https://v15electionpolls.herokuapp.com/parties.json

.sass-cache. and .tmp directories shouldn't be in the repo and should be removed from the whole git tree 😏

http://www.triballabs.net/2013/02/the-basics-of-responsive-d3-charts/

Deploy the app. The best hosting I know is firebase. It's super easy! I already tried deploying with it but I encountered an issue where the d3.js library isn't being compiled correctly to the vendor file.
When deploying, use the dist folder. If anyone can figure out what's the problem with d3 it'll be great. I even tried adding d3 from a cdn but that still didn't work.

Show a chart of the party's mandate trend. There's a reference i started doing in:
party-bar-chart-directive.js, but it needs to be adapted to the new api response.
The party page resolves the following api response:
https://v15electionpolls.herokuapp.com/parties/1.json

The readme doesn't mention that ruby and compass must also be installed in order for grunt to work.
It also doesn't mention that grunt must be installed globaly using npm before running it.

Maybe something in the lines of: "left", "center", "right" (religious? arabs?)