(Bloomberg) -- Last year on the campaign trail, Donald Trump promised to be a champion of the Bitcoin mining industry in the US. Yet as American crypto miners begin to release their first quarterly earnings reports since Trump returned to the White House, it’s clear the group is struggling.Most Read from BloombergNJ Transit Urges Commuters to Work Remotely If Union StrikesNYC Lost $9 Billion of Income to Miami, Palm Beach in Five YearsNew York City Transit System Chips Away at Subway Fare Evasio