Sunday's tweet appears to acknowledge that the meeting was actually predicated on opposition research: "This was a meeting to get information on an opponent." The initial denial - which, again, Trump himself dictated - is pretty irreconcilable with that. (You could perhaps argue that adoption was mostly discussed, even if the meeting was set up to discuss oppo research, but that's a stretch.) And if you're Robert Mueller and you're looking at whether Trump obstructed justice, you've now got even more evidence of a clear attempt to mislead the public and obscure the truth. Trump's July 2017 comments came before we knew he was involved in drafting that initial misleading response; now Trump is in the public record as having authored it.