Robert Mueller has delivered his report on the Trump-Russia investigation to Attorney General William Barr. Sometime soon, perhaps within hours, Barr will send the report's "principal conclusions" to Congress. It will first go to the chairperson and ranking member of both the House and Senate Judiciary committees. It is unclear what will happen after that, but certainly other lawmakers will see the document, and there will be a steady stream of leaks of what is in the report.