Yes the Middle Class is Shrinking. And the Ranks of the Poor Are Shrinking. Because Americans are Getting Wealthier
Mark Perry has a number of good graphs that show that the shrinking of the middle class is real, but only because they are moving to "rich" -- hardly the implication of those on the Left who are trying to demagogue the issue. Check them out if you have not seen them but this animated graph was new to me:
Note the general movement to the right.
Interestingly, the only block on the low side getting larger is the percent of people at "zero". In my mind, this just reinforces my point that the poverty issue is primarily one of having a job, not the rate paid at the job. For that growing cohort at zero, raising the minimum wage only makes it more likely they stay at zero.