The following are plots of the percent of the U.S. counties that is "moderately to extremely dry," going back over a century. Granted, this is a broader brush than the information above, since it puts an area in one of two bins instead of five.
So it definitely shows a serious drought today -- but it's akin to about a dozen that have occurred since 1895, and is not as severe as the 1934 or the mid-1950s (which was both broader and longer). Perhaps the spike are becoming a little more frequent in recent decades, but that's not obvious (unlike what Paul Krugman wrote).
Here's the 12-month moving average, which makes things a little clearer:
And here is the dry area 12-month percentage expressed as its standard deviation from the mean:
The current drought looks like a fairly normal drought, at least so far, with no evidence of "Dust Bowlification." (Notice how Romm sneaks in a plot of heat when writing about drought. They're not the same thing.)
I'm sure many farmers are being seriously affected. But farming has always been a tough business (which is why we have price supports). I just don't see an extraordinary drought in this data, but an ordinary drought.