WASHINGTON (TNS) — Former President Donald Trump and Vice President Kamala Harris are tied in the race for Pennsylvania’s 19 electoral votes — the biggest prize among the battleground states — according to a poll released Wednesday.

The CNN poll had the two major party nominees deadlocked at 47% each. The race is currently also a dead heat in the Real Clear Politics polling average.

But the survey also found U.S. Sen. Bob Casey, D-Pa. in a tie with former hedge fund CEO David McCormick, with each candidate receiving 46%. That’s the first poll showing the two candidates tied. Casey has led in all other surveys and currently is ahead by 3 percentage points in the RCP poll average. He led by 14 points in a New York Times/Siena College poll released at the beginning of August.

The poll was released in advance of next Tuesday’s first-ever debate between Trump and Harris. President Joe Biden’s poor performance during his debate with Trump led to calls for him to drop out of the race, which he did in July.

Pennsylvania was the only one of six battleground states to show the candidates tied. Trump led in Arizona while Harris was ahead in Georgia, Michigan, Nevada and Wisconsin. But all of the leads were with the margins of error.

The poll continued to show that the economy was the top issue on Pennsylvanians’ minds (40%), followed by protecting democracy (27%) and abortion rights (12%). Trump was favored on the economy, 50% to 42%, while Harris had the edge on abortion, 51% to 34%. The two candidates were tied on protecting democracy with 46% apiece, even as Trump is under indictment for trying to overturn the 2020 election in Pennsylvania based on false claims of voter fraud.

The poll of 789 registered voters was conducted Aug. 23-29, after the Democratic convention, and had a margin of error of 4.7 percentage points.