So this is about some volunteer who kept insisting the Trump team meet with Russia; but none other than Paul Manafort rejected the requests?
This seems like a weird story that's outside of any actual collusion that may have happened. If the Trump campaign was colluding with Russia, why would this guy need to continuously request they talk to Russia?
Russia was trying to establish multiple lines of contact with Russia. Based on the timeline it seems the June meeting with the Russian lawyer was the successful one.
What this chain of emails shows is that
1) Russia was trying to get through to the campaign using this low level staffer (which, as Manafort realized was very unwise over campaign email)
2) that the Trumps were aware that Russia was trying to make contact
3) that they also knew meeting with them was legally dubious
And yet they still took the June 9 meeting. Theres other small details, but this could be good enough evidence to prove intent to collide.