The American tells us how, and also tabulates the end results:
"As the chart shows, Obama’s give-and-take tax policy results in marginal tax rates of 34 percent to 39 percent in the $31,000 to $45,000 income range for this family. That’s an increase of 13 percentage points or more from the current rates.""
"While Obama has publicly embraced a tax rate of 40 percent for couples earning over $350,000, his tax policies would result in a staggering 45 percent effective marginal rate in the $110,000 to $120,000 income range for this family. That is 11 percentage points higher than under current law."
"Unfortunately, Senator Obama’s proposed 'tax cuts for the middle class' are actually marginal rate hikes in disguise."