Total midterm ad buying from September 8 through Election Day stands at $1.9B for Republicans and $1.5B for Democrats. Despite GOP groups injecting over $740M into congressional races since Labor Day, polling averages in competitive Senate seats remain largely unchanged. The efficiency of the spending also varies, as Republicans paid $274 per rating point in nine key races in September compared to $201 for Democrats, a result of the GOP's heavier reliance on super PACs.
