Can you share the data, so someone can help you with what you are trying to accomplish.
See attached file.
WI Wards, color encoded by people ranged to 5000, split to five colors with 50% transparency, outlined in black. WMS-OSM background map. WI GIS have already joined the demo data for you.
If you want to show counties; then you'll either need to turn on the layer in the standard map, or merge USGS counties SHP with the WI GIS Wards SHP. Upto you!
WI Wards.twbx 3.1 MB