Newt Gingrich’s fast Florida fade is the latest indication that the Tea Party is losing its grip on the GOP, with the establishment poised to triumph once again.

An official endorsement Saturday night from last year’s Tea Party standout, Herman Cain; an all-but-official backing from longtime Tea Party darling Sarah Palin; and the support of the Tea Party Express have not lifted Gingrich back over Mitt Romney in the Florida polls. That weakened clout has been accompanied by the Republican establishment’s full-throttle charge at Gingrich’s past — to great effect with the primary here just one day away.