Dems removed filibuster for all appointment except scotus in 2013 then R’s removed for scotus in 2017. Now republicans could have done it anyway on 2017 even without precedent, and Democrats could have forced merick garland in if they had gone fully nuclear. I’d call it equally shared
So installer is not recognizing your hard disk. There are plenty of potential causes but One thing to check is bios configuration of the disk drive, is the drive configured as raid? I’ve run into that a couple of times recently.