Trump did himself no favors by saying he trusts his intel community
But can you imagine the outrage if he'd said, "Well, given recent events I'm pretty sure our intel community is a pack of lying grifters who should be executed for treason"? Trump's not going to say that, but I'll bet you that's what he was thinking. He tends to polish the turds until it becomes agonizingly clear that the turd is noting more than a POS.
Russia was just as much our enemy then as they are now.
What does that even mean, "our enemy"? The TV people say that all the time - "our enemy" to someone who is just trying to run a country, and "our friend" to people who are stabbing us in the back fairly regularly. I don't think about other countries in terms of "friends" and "enemies". It think of them as allies or not, and even then it's just on paper and not necessarily in practice. There's no reason why Russia can't become an ally. No reason why China can't be our ally. Not sure why we consider Mexico and Great Britain to be "friends" when they're constantly trying to undermine and belittle us.