Pew suggests about 50% of America is the middle class, earning about $78k a year. I'm not sure what fraction is in manual labor jobs but if labor means working then the rate is about 62%.

From BLS data, about 12.7% of the population lives in poverty, workers/children/etc. This group is disproportionately minority (non white) and an example of the social failing of the richest nation in history.