Out of all people who speak any native language, which person would have the most difficulty with English?

Is there a risk that we will see higher prices at U.S. grocery stores for goods such as pork, beef, grains and dairy as a result of the trade dispute with China?
Does the separation of church and state instituted by the founding fathers of America work as originally intended in the constitution or does it creates problems and contradictions that the government is still trying to solve?