One source here.
[blog.heritage.org]

President Barack Obama has repeatedly claimed that his budget would cut the deficit by half by the end of his term. But as Heritage analyst Brian Riedl has pointed out, given that Obama has already helped quadruple the deficit with his stimulus package, pledging to halve it by 2013 is hardly ambitious.

It doesn't really matter how much but the simple fact that it is growing so rapidly is disturbing. I don't know if we are beyond the point of no return but if it keeps going we will get to a point where we wil never recover from it. What will happen if America defaults on her mortgage?