I agree, except that
- Huck will win Kansas ("modest" Rep from the plains, as in Iowa and rural Missouri; not a state like Wyoming, Montana or of course Colorado)
- McCain will pick Maryland and DC
- but Romney can still win in Rhode Island (look at the map of Massachusets and you will guess why McCain has won in Connecticut and why he'll lose R.I.).
So Romney will drop out (if he hasn't done that tomorrow....) after having been defeated in Virginia or after defeated in Texas.
Huckabee will wait after Mississipi (March 10th) or will go on until the end without campaigning just in order to be in force ahead of the convention.
I looked, and I failed to see how ROmney can still win Rhode Island.