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Nick Clegg has surged into contention as a potential prime minister, according to a Guardian/ICM poll carried out following last night's TV leaders' debate.
A quarter of voters who watched the three leaders on the ITV programme say they will switch their vote, with most changing to the Liberal Democrats.
Clegg emerges from the telephone poll as the overwhelming winner, with 51% who watched saying he came out on top.
David Cameron and
Gordon Brown trail in far behind: 20% say Cameron won and 19% Brown.
The poll, based on a sample of 505 voters who had previously told ICM how they would vote, found Conservative and
Labour supporters also thought Clegg won the event. While 44% of Tories thought Cameron won, 46% thought Clegg did. Among Labour voters, 43% said Brown won, and 44% Clegg.
The Guardian poll coincides with a survey of voting intentions carried out by ComRes for ITV. It showed support for the
Conservatives was unchanged at 35%, with Labour down one point on 28%, and the Lib Dems up three on 24%.
http://static.guim.co.uk/sys-images/...nd_460x276.gif Among those voters who had watched the debate, the surge in Lib Dem support was more dramatic: up 14 points to 35%, only a shade behind the Conservatives on 36%, who were down three. Labour languished in third place, at 24%, down three points.
According to the ICM poll for the Guardian, Clegg appears to have won the affections of voters across the board. He now runs Brown neck and neck as the man voters think would make the best prime minister, 29% to 29%. Cameron remains just ahead on 33%.
Clegg is also far ahead as the leader who offers substance over spin. Cameron comes off worst among people who saw the debate, with 47% saying he is more spin than substance against 36% who say that of Brown and 11% Clegg.
Cameron performed particularly badly with Lib Dem supporters, with 61% saying he offered spin over substance. That suggests the Tory leader's appeal to centre ground voters is faltering.
The debate had a clear impact on people's voting intentions, although the effect may fade as polling day approaches. Among people who saw the debate, 23% say they will change their mind, including 25% of Conservatives and 21% of Labour voters.
Most of them are going to the Lib Dems, with 54% of people changing their minds saying they will move to the party. A further 17% say they will switch to Labour. The Conservatives have attracted the least new support with only 13% saying they plan to move their vote to the party.
• ICM Research interviewed a random sample of 505 people by telephone on 15th April 2010. It re-interviewed people who had previously been selected at random who told us they would be watching the debate and had agreed to be interviewed again. The sample has been weighted to the profile of all people selected at random who previously stated they would be watching the debate. ICM is a member of the British Polling Council and abides by its rules.