Due to higher-than-expected primary spending -- partly driven by the absence of live event campaigning -- political advertising is now expected to total an even bigger record of $6.7 billion this year, according to one estimate. The ad research group now expects spending by broadcast networks and stations to get to $3.56 billion; digital media, $1.82 billion; cable TV, $1.16 billion, and radio to $170 million.
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