Just two weeks into the runoff, Ms Truss has built a double-digit lead over rival.
The latest survey from Conservative Home of 1,003 readers found that 586 – 58.42 percent – of respondents favoured her for future PM.
Mr Sunak, on the other hand, had less than half her support with 261 backers – 26.02 percent of those who answered.
With 26 people – 2.59 percent – choosing to vote for neither, and a further 1.10 percent and 11.86 percent – 11 and 109 – voters saying they wouldn’t vote at all or didn’t know, Ms Truss had a triumphant 32-point lead.