Here comes Prof Across' US Poly Sci refresher lesson for today to show why absolutely nothing it going to happen as a result of Helsinki.:
As a PP above pointed out, it takes the House of Representatives to start impeachment proceedings. And right now the Repugs control the House 236 to 193. IF a bill of impeachment makes it out of the House Judiciary Committee (needs 21 'aye' votes in committee, which it wouldn't have), it needs 218 'aye' votes to be approved by the House. As it stands, that's not going to happen, the Dems simply don't have the numbers nor can they expect that many GOP 'defectors'.
Just to continue on:
If they did have the votes and 'aye' carries, Scrotus is then 'impeached'. This means dick as far as removing him from office. That's up to the Senate, who votes to 'convict and remove'. The Senate is currently 51 GOP, 49 Dem (this includes 2 independents who caucus with the Dems). It takes a 'supermajority' (2/3) or 67 'aye' votes. Again, the Dems simply don't have the number.
This means that the Dems would need to gain a minimum of 25 seats in the House and 18 Senate seats in the midterms. That's why they're so important and why every single vote counts. Do I think they'll get the requisite numbers. Possibly in the House, doubtful in the Senate.
Using DH's Trumpster friend as a bellwether, Helsinki was a success because it 'proved no collusion' and anything contradicting this is 'fake news'.