Candidates, donors and super PACs are spending more than ever on political campaigns. The US midterm elections are on track to be the most expensive for candidates and political donors in history. According to OpenSecrets, a research group that tracks money in US politics, close to a record $12bn has been spent by candidates and outside political groups on campaigning. The world’s richest man, Elon Musk alone has given $445 million to the Republicans, according to campaign finance records.