Want to know what message midterm candidates think will win? Follow the money

With the midterm elections a month away, ad spending tells the story of what messages the candidates and their backers think will win with voters.

For Democrats, there's been a significant increase in spending on ads related to abortion since the Supreme Court overturned Roe v. Wade. And in many races, Republicans have amped up their ads accusing Democrats of being soft on crime.

According to AdImpact, a firm that tracks ads, Democrats spent more than $73 million on television ads about abortion in September, nationwide. That represents about a third of all Democratic television ad spending.

One such ad from the Democratic Congressional Campaign Committee (DCCC), goes after Congressman Steve Chabot, the Republican incumbent in Ohio's 1st congressional district. It accuses Chabot of being "obsessed with banning abortion."