As federal deficits mount to record levels, President Bush now tells us there's light at the end of the tunnel. Not a bright light, mind you, but he does claim that his new budget plan, despite more huge tax cuts, will get the government's books halfway to balanced within five years. There are, however, a few major ifs: If you don't count spending for Iraq and Afghanistan. If you ignore the promised but unbudgeted fix for the alternative minimum tax (hugely expensive). If you expect Congress to slash domestic appropriations by about a quarter in real terms. And, apparently, if you assume that by 2009 we'll still be in Bush's "trifecta" (crappy economy, national emergency, war), so he's entitled to keep spending all the Social Security surplus.