"First, a world-leading Western chipmaker has to have its research arm located in the U.S. or the West, not Taiwan."
Portland advanced logic R&D could be converted to a national lab, like Sandia, Los Alamos or Fermi. The goal would be like Sematech, develop and implement a national semiconductor process, for national fab operators, not just Chandler; if GF Malta wants the process they get it too. Free. But not Israel or Ireland, and not Samsung or TSMC fabs.
I think going forward, a leading, advanced, free (for US operators) semiconductor process would be a huge advantage for the US. The main thing that drove fabs out of the US was the cost. R&D cost is one of the those costs that the US government can subsidize without picking winners. All the other options including the Yoffie solution ("guaranteed orders") are picking winners which leads to moral hazard.