It just seems he's getting more and more desperate, doesn't it? He's started tossing tweeting out vague and/or unsubstantiated claims and accusations to take the focus off of Russia and his failing numbers. He's couched them with '?' to make them 'questions, not accusations' so he can later retract them saying "Well, it was what I was told" as he has before when his claims have been proven false. A tried and true tactic to take the heat off of oneself. Deflect and redirect.
It also seems to me as if many of his usual supporters sycophants in Congress and elsewhere (Ryan, Fox News, et al) are no longer immediately jumping on his every statement as if it were Gospel shouting "yes, yes, investigate!!! MAGA!!" but are beginning to slowly back away and remain silent when he throws a 'Twitter-tantrum'.
Please let it be so and not just my imagination!