Jobs overseas ... a mere talking point that starts with the assumption that economies, including global ones, are zero sum games. That is, one country "wins" jobs means that another one "loses" then.
This thinking flies in the face of the fact that productivity HAS increased globally and the size of the GLOBAL economy (and America's) has increased. Thus the claim is suspect.
A proof, rather than a talking-point assertion, requires you to address this from the perspective of the Broken Window Fallacy. Otherwise I'm forced to conclude you are a mere parrot.