The latest PBO estimate in May was for a deficit of $20.7B. This is $7.2B more than $13.5B ($3,6B plus the original Liberal estimate of $9.9B). There was some deterioration of the economy even after November 2016, but here it is hard to distinguish between slippage due to factors beyond Liberal control and slippage due to Liberal mistakes. The first part of the slippage, even by a generous estimate, won’t account for anything like $7.2B.