Democrats are winning the digital ad wars. Will it matter?

In the online fight for the Senate majority, Democrats crush Republicans in early spending

Week after week, we track political digital ad spending numbers nationwide. While we regularly note which entities are spending the most to influence our politics, many top advertisers are just using ads to reach their own supporters, lobby Congress, or fundraise - not target swing voters with persuasive messaging. 

In fact, when it comes to that metric …