My take (fwiw) is that Tillerson hasn't "worked" for Fat Stuff for quite a while. Russians? The rest of the US government? Yeah, but note this is in a tweet instead of a command.
Quite frankly, it's like he's on the cusp of realizing he's nearly, well, walled off from the levers of power now. Getting one's briefings from Fox and Friends and having what little upper government you had run off or hunker down from fuckery'll do that.
Also, Kasich is regular-ass GOP like Flake, it's just that they have a moral and ethical compass and now are either realigning it or getting blasted for it as too many see "anti-trump" as "liberal". It's an invective slung by the alt-right at Flake as well.
They really aren't. Almost every committee Ranking Member is eligible to receive Medicare (65+). I think Adam Schiff (of the intelligence committee), and the woman who's the D ranking member on the Ethics committee are the only two who are younger than 60.
It's this weird dissonance that the Democrats are the party of the young people but are a gerontocracy in terms of any of their nationally visible leaders, while the GOP that rests on the backs of old white men has a bunch of 40 and 50-somethings running the show.
Ah, so you noticed this as well.
The closer she works with Trump the less of a future she has and I presume she wants one, given her supposed ambitions.
FORMER ambitions.