Prime Minister Keir Starmer might have expected his honeymoon period to last a bit longer than it did.  The Labour leader secured a stomping majority in July, dumping out the maligned Conservative Party, which had enranged the electorate with a seemingly unending string of controversies spanning everything from Covid rule-breaking to borderline financial illiteracy. Starmer entered Downing Street and promised a return to grown-up governance and economic growth. But six months in, the Labour leader is struggling with plunging popularity, and many are still unconvinced about his ability to revive the British economy. In his defence, Starmer was met with…