But again, all speculation on your part. You did it above (and also see below). I just would prefer to see some evidence. But in any case, with respect to speech after speech, these were almost invariably rallies of his own choosing. Remember when he'd fly to Tulsa or Phoenix or some such and have a rally while decrying witch hunt. These were on his own volition, and he never said anything of substance here, except to say things like "witch hunt" "Hilary" etc. This was not a drain on his resources as he wasn't compelled to congress--
he just chose to do it.
You can do a search of the all of Trump's remarks and exchanges with reporters at the American Presidency Project (I've provided a screen shot to show you what you will find--each "Remarks" can be click on to find its content). You can even do searches of key words for all of Trump's press conferences, exchanges with reporters, interviews, press releases...and when I did this, I couldn't seem to find much mention of Russia, Mueller, etc. So I don't really see how, in speech after speech, he had to address the subject.
Here is the weblink if you want to give it a go:
https://www.presidency.ucsb.edu/advanced-search
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More speculation here:
More speculation here: