Elections seem to bring out various statements about manufacturing employment in the U.S. So, here is a review of manufacturing in the U.S. The graph here was created using FRED, which is a great resource for economic data. As a percent of all employees, manufacturing peaked in the early 1940s at 38% and has been declining ever since to now below 9%. As a total number of workers the peak was in 1979 at 19,428,00 people and bottomed out at the end of the great recession at 11,529,00 people. The numbers have recovered slightly to 12,839,00 people in 2019, but this is still shy of the 13,403,00 people in 2008 before the recession. Kevin Drum has a point on fact checking related to this in his post Fact of the Day: Manufacturing as a % of the Workforce, 1985-2020.