Robert Mueller’s investigation into whether Trump’s campaign cooperated with Russia to influence the 2016 presidential election is exceptionally important. Congress must ensure that it is brought to its end to find out the full truth, holds the USA Today editorial board. President Trump asked for ex-FBI head James Comey’s loyalty, requested that he go easy on Michael Flynn and then fired him. Trump then publicly stated that he had done so because of the Russia investigation and said this had “taken off… great pressure.” This and other behavior has indicated that he may have something to hide. It is in bipartisan interest to allow Mueller to finish his probe and expose what really happened.