The Green Party is likely to be the most credible left-wing option in Manchester’s mayoral election on 30 July. But to win, the Greens need to make sure their messaging is as strong as possible. Are Greens ‘the only party that can beat Reform’? It would be great, for example, if the Greens could avoid using the phrase ‘we’re the only party’. Because ahead of the mayoral election, they immediately came out with that message. And that was despite Labour having just won in Makerfield (which is in Greater Manchester). Across Greater Manchester – Bolton to Salford, Trafford to Stockport, Greens…