Immigration reform has stalled because of ugly Republican politics and an insistence by the Democrats that it be all or nothing. This has taken a toll on the country’s economic growth and global competitiveness. Witness the rise of Chinese companies such as Alibaba and Xiaomi — which now have their eyes on U.S. markets — and of their counterparts in India. Entrepreneurs worldwide are building the same technologies as Silicon Valley is. America has lost its monopoly on innovation.