13 July 2020

FiveThirtyEight: Biden’s Polling Lead Is Big — And Steady

Over the past month, Biden’s lead over Trump has been both incredibly stable and unusually large. Amidst Trump’s unpopular handling of the protests that followed the police killing of George Floyd, Biden’s lead has hovered within a tight band of 8.9 to 9.6 percentage points since mid-June, according to FiveThirtyEight’s national polling average. 

This is a sizable enough lead that Trump’s reelection chances are in a precarious position. Take what CNN analyst and FiveThirtyEight alum Harry Enten found earlier this month when he looked back at presidential elections where an incumbent was running since 1940. He calculated, on average, a 7-point difference between the final national popular vote margin and the polls conducted four months out. That might sound like a lot of movement — and it is — but the problem for Trump is even if the polls swung toward him by 7 points, he would still trail Biden by about 2 to 3 points nationally. The median difference Enten found, 4.5 points, would leave Trump in even worse shape. [...]

Additionally, Trump got a few favorable polls in Florida and Pennsylvania. In surveys conducted just before the Fourth of July, Trafalgar Group found Trump tied with Biden in Florida and trailing Biden by just 5 points in Pennsylvania. That might not sound like particularly good news for Trump in Pennsylvania, but considering Biden’s average lead there is more than 7 points, anything that shows that lead waning is a win for Trump. However, the fact that Trafalgar is a Republican pollster with a slight bias toward the GOP isn’t great news for Trump, as in many ways these polls offer his best-case scenario, and that scenario still isn’t very good. It has Trump either barely breaking even (Florida) or still underwater (Pennsylvania).


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