Then, Jeff Sessions just made this all up. He doesn't have a clue. He's has had a lot of trouble with truth-checkers in the past. I see nothing has changed.
Go to his website for his amazingly twisted logic . . . LINK
Here is how he arrived at his numbers
To arrive at the $1.4 trillion spending increase cited by the Budget Committee, one simply has to remove accounting gimmicks from the President’s baseline to arrive at a more realistic estimate of planned spending. Specifically, adjusting OMB’s baseline to account for the inflated estimate of war spending ($800 billion), the cost of the unpaid-for “doc fix” ($400 billion), as well as related interest costs, one arrives at a realistic projection that the United States will spend $44.8 trillion from FY12–23. Thus, the President’s $46.2 trillion spending proposal represents a $1.4 trillion spending increase above a fair current policy baseline.
He admits that he ADJUSTED the OMB's baseline figures to manufacture a $1.4 spending increase (He lied about them).
And he does state specifically that this bogus $1.4 Trillion figure represents increase in spending over current growth projections.
President Obama’s FY 2013 budget proposal has two primary impacts on fiscal policy: a $1.8 trillion increase in taxes and a $1.4 trillion increase in spending above current growth projections—netting less than $400 billion in deficit reduction.