HARRISBURG, Pa. (AP) — Building trades unions — long fashioned as the voice of the American worker — are now intertwined with the richest companies in the world as they create America's artificial intelligence economy. Unionized workers are employed on a huge number of massive data center projects and scrambling to recruit new apprentices to feed the explosive demand. They've also become an ally of tech giants and tech-friendly government officials, echoing the talking point that the is...