In September 2015, Hatton endorsed Jeremy Corbyn's campaign in the Labour Party leadership election. He wrote: "For the first time since the Eighties we have a clear choice between a Tory party supported by big business, and a Labour party based on the trade unions. This might sound very old fashioned, but it's simply a return to the obvious split that has always existed. It was artificially camouflaged under New Labour. It's an exciting time for the whole country, but I fear that the pressure which will be brought to bear from the 'New Labour dinosaurs' and from much of the media will be massive, and Jeremy Corbyn will need strength and support in abundance in order to resist it."