And, by the way, I think Trump's chance of finishing his first term is less than 70%. He's old and someone his age has about a 7% chance of dying in the next 3+ years. Nobody's been more hated as a president, and while he's a pretty hard target, I think he has a 10+% chances of being assassinated - all you need is one traitorous secret service agent and Trump's a goner. I think there's a 5% chance he just gets sick of it all and quits (resigns). And I think there's around a 10% chance he is removed from office because they do find something bad enough about him and Russia or whatever.I think the odds are still roughly the same. He probably won't die of natural causes and he almost certainly won't resign because "he just gets sick of it all." On the other hand, the chance of his being impeached and removed from office is probably more than 10% at this point.
I still think there's a significant chance he'll be assassinated, possibly along with Barr and other investigators in Trump's administration. If those investigators really begin indicting people and if there really is a "deep state," then they'll start killing people to stop the investigations, and I think Trump would be the primary target. And the likelihood of assassination will go up substantially if it looks like Trump is likely to win in 2020.
Whether or not there is a "deep state" is either a matter of definition or degree. There are around 2 million federal employees (far more if you include military) and most of them keep their jobs even when the parties of the president and/or congress change. These bureaucrats are in some sense a "deep state" in that they're entrenched very deeply and nearly impossible to get rid of. However, they're not necessarily a "deep state" by the more commonly used definition of people conspiring to rule over the people while ignoring elected officials and perhaps to use any method, including assassination, to guarantee their continued power.
But do they need to conspire to unseat of assassinate Trump? Or at least conspire on a grand scale? I don't think so. I believe that it is true that the vast majority of federal employees would love to get rid of Trump and I believe that each of those is willing to do at least a little bit in order to achieve that goal. Some percentage is probably willing to do quite a lot more than a little bit. Multiply that percentage, even if pretty small, by 2 million people, and suddenly you have an awful lot effort directed at bring down Trump, perhaps tens if not hundreds of thousands of people.
As a result, no conspiracy is necessary to have Trump assassinated and I think there's about a 10% chance of that happening. From large yet largely unconnected groups of people, unpredictable behaviors will emerge.