Feedback Treemap Project, my own little spin on it

Code Feedback
1

I decided to create my own data to use for this project. Was quite a bit of work to take JSON data from a website, reconfigure it to be used in this project. It’s the 2016 presidential race. Each area is broken down by state, then by republican/democrat. The candidate with the most votes sets the color for that state. Thoughts?
Link:

code I used to extract the data to be used for the treemap:

const treeData = {
    name: "vote data",
    children: []
}
const candidates = ["Hillary Clinton", "Donald Trump"];

const states = [];
const oneState = ["Delaware"]
const url = "https://raw.githubusercontent.com/booshay/temp/master/2016.json";

const dataRemote = fetch(url).then(res => res.json()).then(data => {

    data.map((e, i) => {
        if (states.indexOf(e.state) == -1) {
            states.push(e.state);
        }
    })
    states.map((s) => {
        const stateData = [];
        candidates.map((n) => {
            let cVotes = 0;
            let arr = []
            data.map((c, j) => {
                if (c.state == s && c.candidate == n) {
                    cVotes = cVotes + Number(c.candidatevotes)
                }
            })

            stateData.push({ votes: cVotes, state: s, candidate: n })
        })
        let winner = stateData[0].votes > stateData[1].votes ? "blue" : "red"
        console.log(winner)
        treeData.children.push({ state: s, children: stateData, winner: winner })
    })
    document.getElementById("output").innerHTML = JSON.stringify(treeData)
})