Momentum won't let him.She embarasses herself every time she opens her mouth.
The biggest fraud in politics how Sir Keir hasn't booted her I'll never know.
Labour still harbours a number of MPs who are abhorrently toxic to any floating voter in the middle ground: Abbott, Burgon, Lammy, Nandy, Thornberry and the like. Starmer does not have full enough control of Labour to get rid of them. Until Labour rids itself of the Momentum elements, the bulk of the country will continue to vote on the basis of "Anyone but those numpties", as is evidenced by the fact that Boris Johnson holds an 80-seat majority in the Commons and Labour just lost 300 local Councillors.