Imagine that: Obama has understated the red ink

"Under the President’s budget, debt held by the public would grow from $7.5 trillion (53 percent of GDP) at the end of 2009 to $20.3 trillion (90 percent of GDP) at the end of 2020. As a result, net interest would more than quadruple between 2010 and 2020 in nominal dollars (without an adjustment for inflation); it would expand from 1.4 percent of GDP in 2010 to 4.1 percent in 2020."