Yesterday, President Trump tweeted:
I had to fire General Flynn because he lied to the Vice President and the FBI. He has pled guilty to those lies. It is a shame because his actions during the transition were lawful. There was nothing to hide!— Donald J. Trump (@realDonaldTrump) December 2, 2017
So Trump is now saying he knew that Flynn was guilty of a felony (lying to the FBI about Russia contacts) when Flynn was terminated. Reaction was swift, as many observers noted that the tweet further implicates Trump in felony obstruction of justice. Comey has testified that after the termination of Flynn, Trump asked him to back off the investigation. Then Trump fired Comey and, later still, Trump told Lester Holt that he fired Comey because of the "Russia thing." The tweet isn't proof of obstruction--Comey could have lied and Trump could have been talking about some other Russia investigation--but it establishes that Trump believed Flynn to be guilty of a crime at the time Flynn was fired, so all of Trump's actions with respect to Flynn afterward can be interpreted in that light.
As many pointed out, this is an example of why Trump's tweeting is a defense attorney's nightmare. Of course, Mueller's team carefully monitors Trump's tweets for these unforced errors, and no doubt this one caught their attention.
Subsequently, in an attempt to clean up after Trump, Trump's attorney. John Dowd, took one for the team, claiming that he wrote the problematic tweet.
There are at least two reasons to doubt Dowd's claim: 1 this would be so sloppy, so uncharacteristic of the way a defense attorney would behave, it's arguably a case of serious legal malpractice; 2. I can't imagine any attorney writing "pled guilty" rather than "pleaded guilty" (spellchecker just flagged pled). This particular attorney is a premier white-collar criminal attorney, so for both reasons I find the claim that he wrote the tweet to be ludicrous. It makes far more sense that the tweet was just one of dozens of tweets this week in which Trump shot from the hip.
Later, Trump (or was it Dowd or John Miller or John Barron) tweeted the following:
I never asked Comey to stop investigating Flynn. Just more Fake News covering another Comey lie!— Donald J. Trump (@realDonaldTrump) December 3, 2017
I suppose Comey could have lied, but a fair look at the record shows that Trump has for his entire career been a demonstrably insistent teller of falsehoods, against Comey who has no such reputation, except according to Trump.