  In this paper we propose a novel method to forecast the result of elections
using only official results of previous ones. It is based on the voter model
with stubborn nodes and uses theoretical results developed in a previous work
of ours. We look at popular vote shares for the Conservative and Labour parties
in the UK and the Republican and Democrat parties in the US. We are able to
perform time-evolving estimates of the model parameters and use these to
forecast the vote shares for each party in any election. We obtain a mean
absolute error of 4.74\%. As a side product, our parameters estimates provide
meaningful insight on the political landscape, informing us on the proportion
of voters that are strong supporters of each of the considered parties.
