The tracker also found Corbyn's favourability has improved from record lows ahead of the election - highlighting the impact of the media smear campaign against him at the time.
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Tony Blair slipped to a lowly seventh place, while just 66 per cent had a favourable opinion of Clement Attlee.
Phillips said she had to "be honest" with herself and "that person is not me".
Ms Phillips is expected to make a statement on the status of her campaign on this afternoon.
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It comes after a campaign to urge 'centrists' who left over Jeremy Corbyn to return to the party.
Jess Phillips said she did not hope that Brexit fails or causes a ‘calamity’ in the country.
Ms Thornberry insisted she was best placed to oust the PM within five years.