For those who still say there was no collusion, please take a look at the circumstances and details that resulted in the Papadopoulos guilty plea, substitute Trump campaign with Clinton campaign, and let me know what you think...
It looks to be the tip of the iceberg. The persons above him in the Trump campaign that he was keeping informed about his activities with the Russians are not named. Seems like there is more stuff to be revealed and more people, higher up, who will be targeted by the investigation.
It is along the lines of, and even more incriminating, than the Donald Trump Jr emails where he said "I love it" when offered a meeting with Russian government agents who claimed to have "dirt" on Hillary. That, in itself, is evidence of intent to commit a conspiracy to violate campaign laws prohibiting foreign agents from getting involved in our elections.