Labour's deputy leader wants party members to be "one team" before the Gorton and Denton by-election.
The government has repeatedly refused to rule out increasing income tax in this month's Budget.
Chris Mason looks at what Lucy Powell's return to frontline politics might mean for Labour.
She defeated Education Secretary Bridget Phillipson in a race triggered by Angela Rayner's resignation.
A Labour activist since the age of nine, the Manchester MP has promised to be a voice for party members.
The pair are going head-to-head to be Angela Rayner's replacement, but what are they battling for?
Lucy Powell and Bridget Phillipson go head-to-head at the very end of the Labour Party conference.
Education Secretary Bridget Phillipson is running against Lucy Powell for Labour's deputy leadership.
The education secretary and Labour deputy leader hopeful signals that the policy could be scrapped.