Whose spending? Both. If that graph were honest, it would show part of the tax cuts as Obama's since he renewed them. Even as is, it shows that Obama has added 1.44 trillion to the debt, and that is nothing to celebrate.
So if Obama simply decides to continue spending on stuff that the previous administration did he gets a pass? Looks to me like a little more than $3 Trillion of that stuff under Bush is, at a minimum, shared.