Of course the problem even the US govt has is that if they push Twitter too hard it can simply up sticks and move head office to somewhere like Iceland, out of the reach of Uncle Sam, then gradually move the server farms to Canada and the like.
Also fake accounts and buying ads are hardly equivalent to letting the CIA have a backend into the whole thing. A logic fail by the Senator there. It seems the big bad bogie of the Russians has some in the US losing their sense of perspective.
And since Voice of America has been beaming propaganda into Russia for many decades my heart fails to bleed. So arms in the info wars are more equal, a bit like Iran reverse engineering that Predator then using theirs to buzz US warships in the Gulf.