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All countries · Try it · Comeback calculator

How far behind is too far?

Pick how far the second party trails and how long is left. We look up every one of 901 elections in ten countries and count how many came back.

0% of runners-up 16.0 points behind 1 month out finished first
0 of 99 · Every country

The odds of a comeback, 1 month out runners-up by how far behind, every country

0–2 pts
n=99
2–4 pts
n=84
4–6 pts
n=73
6–8 pts
n=78
8–10 pts
n=69
10–14 pts
n=106
14–20 pts
n=130
20+ pts
n=162

0% of runners-up 16.0 points or more behind finished first (0 of 244).

Today's races the second party in each of our averages, against every election we hold

Every runner-up that far behind 1 month out 99 cases; comebacks first

US Nebraska president 2020 Joseph R. Biden (Democrat) 16.0 points behind → 39.2%
US Oklahoma Senate 2020 Democrat 16.0 points behind → 32.8%
US California governor 2018 Republican 16.0 points behind → 38.0%
US New Mexico Senate 2014 Republican 16.0 points behind → 44.4%
US Hawaii Senate 2012 Republican 16.0 points behind → 37.4%
US North Carolina governor 2024 Republican 15.9 points behind → 40.1%
UK general election 1983 Labour 15.9 points behind → 28.3%
US Alaska governor 2018 Democrat 16.1 points behind → 44.5%
US Pennsylvania Senate 2018 Republican 16.2 points behind → 42.7%
US Colorado governor 2022 Republican 16.3 points behind → 39.2%
US New Hampshire Senate 2020 Republican 15.7 points behind → 41.0%
US Ohio Senate 2018 Republican 15.7 points behind → 46.6%
US Texas president 2012 Barack Obama (Democrat) 16.3 points behind → 41.4%
US Alaska president 2008 Barack Obama (Democrat) 15.7 points behind → 37.9%
US Connecticut president 2008 John McCain (Republican) 15.7 points behind → 38.2%
US California president 2012 Mitt Romney (Republican) 16.4 points behind → 37.1%
US Illinois Senate 2022 Republican 16.5 points behind → 41.5%
US New York Senate 2022 Republican 15.5 points behind → 37.7%
US Maine Senate 2012 Democrat 15.5 points behind → 13.3%
US Tennessee president 2008 Barack Obama (Democrat) 16.6 points behind → 41.8%
US Montana Senate 2014 Democrat 16.7 points behind → 40.1%
US DES Senate 2010 Republican 16.7 points behind → 40.0%
US New Hampshire governor 2022 Democrat 15.2 points behind → 41.6%
US Tennessee governor 2018 Democrat 15.2 points behind → 38.6%

And 75 more.

The biggest comebacks from 1 month out

Republican 2010−13.2
Republican 2014−8.4
Donald J. Trump (Republican) 2016−8.3
Donald J. Trump (Republican) 2016−6.8
Donald J. Trump (Republican) 2016−6.6
Republican 2016−6.1
Labour 1951−5.8
Republican 2016−5.7
Republican 2020−5.7
Liberal 1993−5.0
How this works

For every election we hold polls for, we take each party's poll average at fixed points before polling day (two weeks, a month, two months, and so on to three years) and its gap to the party leading that average. Only the leader and the runner-up count: a comeback means the second party overtaking the first. A party "finished first" if it won the most votes, which is not always office: Gore in 2000 and Clinton in 2016 won the popular vote. "That far behind" means within two points either side of the figure you chose.

The data: Great Britain 1950–2024 (Mark Pack's PollBase; February 1974 only, as the two 1974 elections share a year); Australia, Canada, France (first round), Germany, Italy, the Netherlands, Poland and Spain from our own poll archive; US Senate, governor and presidential races state by state since 2000; the US national vote since 1952 (before 2000, Gallup's June poll only). Past comebacks are not a forecast: our forecast for each country already allows for how much polls move this far out.

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