Possible to show aggregate votes in a tooltip on a markercluster?

I'm building an interface that would take poll data in and show some results over a marker cluster using Mapbox but I don't have any experience with it.

The interface would look much like https://www.mapbox.com/mapbox.js/example/v1.0.0/leaflet-markercluster/

If you click on the cluster instead of zooming in a tooltip would show up with a breakdown of (yes/no) votes in a pie chart like this https://www.dropbox.com/s/hv4c8708wlhe4mt/Screenshot%202014-11-30%2015.27.53.png?dl=0

In the GeoJSON data I was thinking each data point would have a property to state the vote value and somehow I could look at them in aggregate at the cluster level

geoJSON structure

{
  "type": "Feature",
  "geometry": {
    "type": "Point",
    "coordinates": [125.6, 10.1]
  },
  "properties": {
    "vote": "yes" //no
  }
}

Is this possible using these libraries and geoJSON data structure? Am I on the right track? Thanks for your guidance