Here I tried to show all the State Senate and Assembly districts for the state of California. Plus if you click on a given district the district number and name of the representative shows up in the info box.
Modified http://d3js.org/d3.v3.js to a secure url
Modified http://d3js.org/topojson.v1.min.js to a secure url
Updated missing url http://bl.ocks.org/mpmckenna8/raw/f43a842a8953e87f5b3c/63d5445b60d94813c85acd7fa02227d2f253f41e/d3.geo.zoom.js to /mpmckenna8/f43a842a8953e87f5b3c/63d5445b60d94813c85acd7fa02227d2f253f41e/d3.geo.zoom.js
https://d3js.org/d3.v3.js
https://d3js.org/topojson.v1.min.js
https://bl.ocks.org/mpmckenna8/raw/f43a842a8953e87f5b3c/63d5445b60d94813c85acd7fa02227d2f253f41e/d3.geo.zoom.js