scrape538.php

<?php
$conts = file_get_contents("https://projects.fivethirtyeight.com/2020-primary-forecast/");
$obj = [];
foreach(explode("\n", $conts) as $line) {
	$line = trim($line);
	if(preg_match("/^interactivePage\\.([a-z]+) = (.+);$/", $line, $matches)) {
		[$_, $key, $value] = $matches;
		if($value[0] === "'") $value = str_replace("'", '"', $value);
		$obj[$key] = json_decode($value, true);
	}
}
var_dump($obj);