'HOW DID IT START?': Trump melts down on Twitter in manic attack on Russia investigation
President Donald Trump rants about the Mueller probe on the White House lawn (Screen cap).

President Donald Trump tweeted for a second time about special counsel Robert Mueller's now-completed investigation into Russian collusion Saturday morning, telling followers he wanted to "get this straight."

"There was No Collusion and in fact the Phony Dossier was a Con Job that was paid for by Crooked Hillary and the DNC," the president posted. "So the 13 Angry Democrats were investigating an event that never happened and that was in fact a made up Fraud."

"I just fought back against something I knew never existed, Collusion with Russia (so ridiculous!) - No Obstruction," he added. "This Russia Hoax must never happen to another President, and Law Enforcement must find out, HOW DID IT START?"

Earlier in the morning, the president tweeted that he had not read Mueller's report and claimed it cleared him of accusations of collusion and obstruction of justice.

Attorney General Bill Barr's summary, however, only said that the special counsel found no evidence of Russian collusion — and that Mueller had not found conclusive evidence for or against claims that the president obstructed justice.