AI infrastructure supply chains could be heading for a major shift. If the US moves to restrict Chinese-made components used in AI data centers, cloud giants might have to lean more on domestic and allied suppliers. Three names I'm keeping an eye on: $Coherent(COHR)$  is already getting attention as investors price in potential demand from hyperscalers like Amazon, Google, Microsoft and Meta. $Lumentum(LITE)$  is an established supplier to major cloud players — any supply shift away from China could open up a meaningful opportunity. $Applied Optoelectronics(AAOI)$  is building US manufacturing capacity in Texas and looks positioned as a direct AI data center optics play. Policy changes can create new winners, and this theme is worth watching closely.