This is a false dichotomy. On the whole, our economy isn't hurt by sending manufacturing overseas. If it costs less to produce a product overseas than here, then the price for that product will drop. Lower cost of product means higher standards of living for everyone. Why do you think so many people have smartphones? How many do you think would have smartphones if they were manufactured here?

On top of this, the number of jobs is not a fixed number. The workers who lost their jobs in manufacturing can be more productive in other jobs, which benefits everyone. Also, money people save by purchasing cheaper products is money that can be spent elsewhere, increasing demand for other goods and thus supply, which means more workers in other areas. By only looking at the smaller picture losses (manufacturing jobs), you're missing out on the larger picture gains (greater productivity, higher standards of living).