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Marcus Roberts is an executive project director at YouGov.
If Corbyn holds to his current position of delivering an alternative Brexit, we could see a Liberal Democrat victory.
Raising the barriers for participation in the Labour leadership poll won't put Corbyn voters off.
The lesson of the 2015 general election is to look for the clues underneath the surface.
Marcus Roberts on the referendum's undecideds.
The polling inquiry has laid out the challenge - now pollsters must meet it.
By presenting himself to voters as who he truly is, the Labour leader has given himself a chance of winning their respect and understanding.
The party's present strategy of managing a declining poll lead must be altered.
The man who masterminded Obama's two election victories embodies daring politics.