For the past 18 hours or so, the mainstream media has joined online lefty sites with the seemingly big news that the 10-year Trump budget plan contains a $2 trillion "math error" that makes the premise of the entire thing totally laughable. What they're telling you is that the White House counted the same positive numbers twice - once assuming that economic growth would render tax rate cuts revenue neutral, and then counting the same economic growth as the cause of an entirely different $2 trillion in new federal revenue.
Even if you can assume the tax cuts will spur economic growth causing an additional $200 billion in revenue, the left and the media claim, the White House screwed up by counting that revenue twice when in fact it is only going to happen once.
The media and the left are wrong. Or lying. Or both.