The 2018 midterm elections are shaping up to be a blockbuster for political advertising, with overall spending is expected to be up 50% from the 2014 midterms, and may pass 2016. According to data from ZypMedia, a local-focused digital adtech firm, there has been a significant shift toward OTT in just the past year. In 2017, 32% of the digital marketing mix was OTT, with the remainder spent on display and pre-roll video.