Political scientists will be arguing about this Presidential-primary season for years.
A few weeks ago when the loyalty pledge was first mooted it looked like a clever insurance policy for the Republicans. After all if Trump were to run as an independent and win even four or five per cent of the vote he could easily hand the Presidential election to the Democrats.
But as Trump extended and enlarged his position as the G.O.P. frontrunner Priebus’s ploy came to take on a rather different aspect.
From the vantage of Trump and his advisers it must have seemed as if the Republican establishment – which they hold in utter disdain – were repeating the mistake of the Trojans and pulling the Greek horse into its midst.