The GOP has, at best, a mixed record on SCOTUS justices. In my politically aware lifetime, i.e from Reagan to now, Thomas, Scalia, Alito, and now Gorsuch are/have been great. But the same Presidents gave us Sandra Day O'Connor, Souter, Anthony Kennedy, and John Roberts who are, at best, unreliable.
Contrast that with nominees by Clinton and Obama (Ginsberg, Breyer, Sotomayor, Kagen) and find ONE of them who isn't 100% predictable in every single case of any significance. I challenge you. Totally reliable left wing votes, every time.