Mueller concludes Russia probe, delivers report to AG Barr

Special counsel Robert Mueller on Friday turned over his long-awaited final report on the contentious Russia investigation that has cast a dark shadow over Donald Trump's presidency, entangled Trump's family and resulted in criminal charges against some of the president's closest associates.

The comprehensive report, still confidential, marks the end of Mueller's probe but sets the stage for big public fights to come. The next steps are up to Trump's attorney general, to Congress and, in all likelihood, federal courts.

The Justice Department said Mueller delivered his final report to Attorney General William Barr and officially concluded his probe of Russian election interference and possible coordination with Trump associates. The report will now be reviewed by Barr, who has said he will write his own account communicating Mueller's findings to Congress and the American public.

Barr said he could send his account to Congress quickly.

"I am reviewing the report and anticipate that I may be in a position to advise you of the special counsel's principal conclusions as soon as this weekend," Barr said in his letter the top Republicans and Democrats on the House and Senate Judiciary committees.

With no details released at this point, it's not known whether Mueller's report answers the core questions of his investigation: Did Trump's campaign collude with the Kremlin to sway the 2016 presidential election in favor of the celebrity businessman? Also, did Trump take steps later, including by firing his FBI director, to obstruct the probe?

But the delivery of the report does mean the investigation has concluded without any public charges of a criminal conspiracy between the campaign and Russia, or of obstruction by the president.