Thought this was interesting from Mueller: that, with respect to obstruction laws, it doesn’t matter whether witness tampering occurs in a public rather than private forum (on Twitter say, instead of in a darkened room):
Third, many of the President’s acts directed at witnesses, including discouragement of cooperation with the government and suggestions of possible future pardons, took place in public view. That circumstance is unusual, but no principle of law excludes public acts from the reach of the Obstruction laws. If the likely effect of public acts is to influence witnesses or alter their testimony, the harm to the justice system’s integrity is the same.
.i`` * ^ / . . . . . ` `~ 