Net worth is projected to fall from $191 billion now to $168b by 2027.
UPDATE: Finance Minister asks National to stop leaking budget information.
How much does rail need to be a success?
Is it something of substance or just PR fluff?
Softer economic conditions are reducing growth in tax revenues.
Her decision to consider a second Brexit referendum was the final straw for Conservative MPs.
But will anything really change?
Watch Grant Walker interview NBR's political editor Brent Edwards and political commentator Bryce Edwards.
Will it speed up new subdivisions?
Where will the money come from?