Machine shops/trades are one of the econ bellweathers. Why are they booming so big for Trump's econ and nothing for Obama's IN EIGHT YEARS?

Currently, most machine/job shops are working all the overtime employees can handle, starting shorly after Trump took office. Shops are even recruiting from eastern Europe! All this occuring after Obama handed Pres Trump an awful one point two percent GDP Growth Rate which Trump quickly more than doubled!
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