I suspect this information finally becoming officially known as opposed to widely known but without official confirmation is why Mueller & C0. was allowed to proceed with what looked like and probably was an establishment attempt to dethrone Trump. With no substance to find, the frantic digging had to throw up this particular dirt eventually and, because Trump and the Trumpists are NOT the source, but rather the source is Mueller who was put in place to kill the king, the information cannot now be be denied even to the liberal hoi polloi without claiming that Mueller et al are a Trump creation.
What! It was Hillary and The Obama Administration who colluded with the Russians? /s
It WAS the RUSSIANS!!!