As part of the 2011 Budget Control Act, Obama agreed to spending reductions of about $1.5 trillion over the next ten years. If you count the interest, the savings is actually $1.7 trillion. Boehner should have no problem remembering the details of that deal: As Greg Sargent points out, Boehner at the time actually gloated about the fact that the deal was "all spending cuts."
And now, with this latest offer, Obama is proposing yet more spending reductions, to the tune of several hundred billion dollars. Add it up and it’s more than $2 trillion in spending cuts Obama has either signed into law or is endorsing now. That’s obviously greater than the $1.6 trillion in new tax revenue he’s seeking. (And that doesn't even take into account automatic cuts from the 2011 budget sequester, which Obama has proposed to defer, or savings from ending the wars in Afghanistan and Iraq.) So, yes, Obama’s proposal is unbalanced—but not in the way Republicans seem to think. If Obama were proposing a truly balanced plan, he’d be calling for even more tax revenue or even less spending reduction.