Three reasons why Donald Trump might outperform the polls
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Subscribe to enjoy similar stories. THIS IS AMERICA’S closest presidential contest since at least 2000. With hours to go before the polls close, forecasting models, including The Economist’s, are showing a nearly 50/50 race, because swing-state polls are roughly tied.
Thanks to one last batch on the campaign’s final day, our model favours Kamala Harris over Donald Trump by a very narrow margin, giving her a 56% chance of victory. Others show an even tighter race: Split Ticket puts Ms Harris on 53%, and both FiveThirtyEight and Silver Bulletin have her at 50%. In states where our model gives the leader at least a 90% chance to win, Ms Harris has 226 electoral votes to Mr Trump’s 219.
In the remaining seven states, the two are within three percentage points of each other in all state polling averages. Ms Harris is clinging to one-point leads in Michigan and Wisconsin; Mr Trump has similarly small edges in North Carolina and Georgia, and a slightly larger one in Arizona. Nevada and Pennsylvania are a dead heat.
The vice-president’s easiest path to victory is winning the Rust Belt states of Michigan, Pennsylvania and Wisconsin—just as the former president’s task is to break through this northern “blue wall", as he did in 2016. If Ms Harris loses even one of these states, she would have to pick off a Sun Belt state where Mr Trump is currently in the lead. And yet the race will probably not wind up as close as polls suggest.
Since 1976, state polling averages have missed the final margin between the two nominees by an average of four percentage points. Moreover, when surveys underestimate a candidate in one part of the country, they generally err in the same way in other parts, too. At least a modest nationwide error is
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