Trump's comments to Holt were as incoherent and ambiguous as one has come to expect from this master of communication.
Here's what he said:
He had made a recommendation. But regardless of recommendation, I was going to fire Comey knowing there was no good time to do it
And in fact, when I decided to just do it, I said to myself -- I said, you know, this Russia thing with Trump and Russia is a made-up story. It's an excuse by the Democrats for having lost an election that they should've won.
Here's one interpretation of the above that does not entail that Russia is the reason for the firing. This is my own interpretation, not one I've seen elsewhere, but I think it's consistent with the above jumble of half-thoughts. I'm not saying it's what Trump meant, because who the **** knows what Trump means when he opens his mouth? (Even Trump seems puzzled by his own utterances.)
I had decided to fire Comey. I realized, however, that this might interfere with the ongoing Russia investigation, but I decided to do it anyway since the Russia investigation is pointless. There was no collusion, so interfering with an investigation bound to fail is not a significant issue.
Of course, the common interpretation around here is something like this:
Comey is fixated on this Russia investigation and we need to get past it, so I fired him.
That is also consistent with what he said.