Which Political Ads Are Making A Splash, And Which Are Falling Short?

If you've turned on your TV or logged on to YouTube lately, you've probably been bombarded by local campaign ads. There are those from candidates themselves, and those produced by super political action committees (PACs).
Who's behind those ads, are they working, and what do they tell us about the state of a number of races, in the midst of a pandemic? To help us answer those questions, we turn to WBUR's senior news analyst John Carroll.