The only cloud in the sky for the two front runners was over Trump with the loss to John Kasich, the no hope challenger who won his home state where he is governor. Clinton swept the board. Sanders battles on but it would take extraordinary events for him now to come through. Trump took Florida, until recently a cert for Rubio as his home state. In doing so he kicked glamorous establishment hope for stopping Trump out of the race. Missouri is too close to call between Trump and Cruz and also between Sanders and Clinton. Both underdogs need the win to keep going with credibility rather than bravado. On the face of it it looks a Clinton cert for the Democrats and an unstoppable Trump for the Republicans.
Yet there looms the brooding shadow of the Republican establishment, aged and out of touch with both its members and the country, who may just fix a brokered convention which does in the end stop Trump with a late night deal forged in smoke filled rooms by overwrought fixers who manage to shoe in a compromise whom nobody hates, a steady pair of hands that nobody really wants. If that happens they will have asserted their authority and got their fix, but the Presidency will be dead out of reach. Clinton will walk it.