Why won’t Labour go for Zac Goldsmith’s non-dom jugular?

Trailing in the polls with three days to go until the London mayoral elections, Zac Goldsmith continues to attack his rival Sadiq Khan by accusing him of having links with extremists.   It is a pretty desperate strategy, reduced to making the charge that Khan has ‘shared a platform’ with extremists.   It is also somewhat undermined by the revelation that Goldsmith himself has been photographed smiling alongside Suliman Gani, the Tooting Iman who is subject of many of the claims.  Gani also appears to have shared platforms with Conservative MP for Battersea, Jane Ellison, on a number of occasions.

But one thing puzzles me.  While Goldsmith’s campaign has stooped to a relentlessly negative attempt to taint Khan with vague charges of links to Islamic extremism, Khan’s campaign has declined to hit back by going for the jugular on Goldsmith’s most-obvious weak spot: his past as a non-dom.   After what can be best described as gentle prodding, Goldsmith published his tax returns in February, revealing that he had paid £4.5