A different approach should be taken towards this. The same ends can still be achieved with a censure of Trump with real legislative teeth behind it, perhaps in conjunction with section 3 of the 14th Amendment (which would prevent him from running for office again). This would only require a few of the seven Republicans who were willing to convict regarding impeachment to vote to censure Trump in a serious, meaningful way.
This strategy is actually politically possible and I am continually updating it as events evolve in The War After the Election [https://medium.com/illumination-curated/the-war-after-the-election-545de96aa4ca?sk=627c55d616d9296af3e398f1686493a4] and in a short six paragraph link at the end of it which explains the very targeted, but critical legislation that could be attached to the censure.
While it was obvious that the Republicans were not going to convict no matter what, Trump’s support may continue to deflate over time. As that happens, more Republicans will continue to distance themselves from Trump as Nikki Haley just has.
My own view is that now that the impeachment is over, a more thorough investigation should take place for national security purposes. There is talk from the Justice Department about using RICO statutes to dig deeper into what happened. This will take time, but as this kind of information is unearthed it should swing public opinion against Trump just as it did against Nixon. And then the appropriate actions can be taken to meet out justice not just to Trump but to others and to address the national security aspects of the situation.