A week after China said its supercharged rail system has reached speeds of 600km/h (373mph), US President Donald Trump seemingly pulled the plug on American rail progress.In a controversial move being challenged by the state of California, Trump cancelled US$4 billion in federal funding for its high-speed railway project.Regardless of the outcome of any legal challenge, Trump’s announcement highlights the contrasting development paths of the economic superpowers in their rail aspirations, or...