Keir Starmer's campaign rests on the idea that Labour lost in December because it didn't have a polished leader who could play the Westminster game effectively - if he wins on this basis, the lurch to the Right will be swift.
It's not enough for Labour leadership candidates to just say they'll support radical policies. They need to prove they'll fight for them - against big business, the political establishment and the billionaire-owned press.
There's never been a more urgent time to support socialist alternatives to Britain's right-wing media. If you believe in what Tribune is trying to do - here's five ways to get behind us.
The Murdoch press has started its attacks on Rebecca Long Bailey and her Salford 'mafia'. It's not hard to figure out why - Salford is a proud and radical working-class community that points the way forward for the Labour Left in 2020.
Labour lost this election not because it was too much of a working-class party, but because it was too little of one in too many places. Our cause endures - but now is the time to steel ourselves for the next fight.
Labour's manifesto shows that the party understands the urgency of the burning injustices that are stunting the lives of millions in Britain today - and is prepared to take action to end them.
Tomorrow Jeremy Corbyn will launch Labour's manifesto with a firebrand speech that takes on the elite who have rigged our economy – and promises a future worth fighting for.
Labour must avoid being dragged to the centre in this general election campaign. It's time to make the case for socialist policies that would transform the lives of millions.
Royal Mail workers aren't just fighting for their jobs - they are fighting for the future of postal services across the UK. It's time for the public to get behind them.
Now is not the time for grubby deals with the political centre. Labour should take Boris Johnson on with a bold, socialist plan to transform the lives of millions.
Forty years ago a socialist revolution in the tiny Caribbean island of Grenada threatened to upturn the world economic order.
Now that Boris Johnson is Prime Minister, the risk is that all of politics becomes enveloped by his persona. Labour can only prevent that by fighting him with clear socialist policies.