If justice Roberts recuses himself, who would take his place?
I hope it happens that way.
As Chief Justice, John Roberts appoints the FISA judges, whose fraudulently-obtained surveillance approvals are central to the coup against President Trump. While I remain convinced that the House will not impeach him, if that were to occur it seems inevitable that Roberts would be a material witness and would recuse himself.
While normally the Vice President presides over the Senate, he would have an obvious conflict of interest in this instance. So, the Constitution stipulates that the Chief Justice must preside over any impeachment trial of a President, but it is silent about any succession were he to be unavailable. The most senior of the remaining justices is the logical successor, and that is Clarence Thomas, who took his seat in 1991.