When will the SNP put itself before the Greens?

The junior partner is the biggest winner from the continuation of the discredited power-sharing deal.

Humza Yousaf, the First Minister, almost seems to be performing the role of public shield for the Greens. Photo by Craig Brough-Pool/Getty Images

According to John Curtice, the SNP’s Holyrood coalition with the Greens is playing no part in the former’s precipitous decline in the polls. Instead, he says, the fall finds its origins in this year’s somewhat bad-tempered leadership contest to replace Nicola Sturgeon.

I don’t want to argue with the great guru of British psephology, but I wonder if that’s strictly true. And, of course, there’s more to politics than opinion polls, important though they are.