No.
I’m asserting that - based on the Politico article - there’s nothing to indicate that DNC was merely trying to discover Trump’s efforts to collude with the Russians to win the election. If you’ve seen anything there which indicates otherwise, let me know what that might be.
[After the focus of Russian election tampering came to the forefront, it’s easy to conflate any concern about Russian ties with election collusion, but that was not the case at the time the DNC was digging for stuff on Manafort, and there’s nothing to indicate that this had anything to do with their concerns.]