WPP’s media buying shop GroupM expects record-breaking political ad spending next year, and that should give the television industry a biannual revenue tailwind like no other. Brian Wieser, global president of Business Intelligence for GroupM, forecasts campaign spending will increase $3.6 billion to what would be a record $9.9 billion in 2020 — or a 57 percent increase compared with the last presidential election year, when $6.3 billion was spent in 2016.

“Political advertising skews television growth rates in extreme ways. However, political advertising has a meaningful impact, especially at the local level of television,” Wieser’s just-released U.S. Media Forecast Report says.