It’s a similar story in Pennsylvania: From early May through July 29, Republicans aired 28,438 ads to Democrats’ 17,322. But from July 30 through Sept. 14, Democrats out-advertised Republicans 30,882 spots to 15,702 — in large part because the Trump campaign aired only two ads during those six weeks. That should be especially alarming to Republicans, since the FiveThirtyEight model believes that Pennsylvania is the likeliest state to decide the 2020 election.

The Trump campaign also didn’t air a single commercial in a Michigan-based media market from July 23 through Sept. 7. Although the campaign is now back on the air, Michiganders saw 38,261 pro-Biden ads from early May through Sept. 14 and only 15,866 pro-Trump ads.

Trump is still on the air in other crucial states, such as Florida, North Carolina and Wisconsin — but even in those states, Democrats have been airing more ads than Republicans since late July. Here are the shifts in each major swing state — defined as the states with more than a 1 percent chance of being the Electoral College tipping point, per the FiveThirtyEight model.