Some Obama-like trends in voting patterns:

On April 1, as the campaign began, YouGov found Tory support among 18 to 34-year-olds at 37 points, Labour on 31 and the Liberal Democrats on 20.

But the manifesto launches and the first TV debate appear to have prompted a huge switch, reversing the Tories’ 17-point advantage over the Liberal Democrats into a 17-point deficit. Figures produced over the weekend show that young people now put the Liberal Democrats in front on 41, Labour on 28 and the Tories languishing third on 26.

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