In the fifteen minutes a day I allow myself to talk and/or think about Trump, I had this thought: You know how furious and incoherent he's been this last week? Well for the rest of his days in office and a long time after, he will never be less furious or more coherent. That's just the nature of this guy and I doubt many of his supporters would even praise him for any ability to be calm and rational when under attack. The Ukraine matter will only go away or recede into the background if/when it is displaced by a bigger scandal and an even more impeachment-worthy crime.
Here's Frank Rich on Trump's increasingly-worse skills at Crisis Management.