The Senate's most famous brain donor, Democrat Barbara Boxer, publicly stated her belief that judges should require a super majority vote to be confirmed -- standing the constitution on its head.
Her argument stemmed from her erroneous belief that once a judge is in, you can't get them out. That's actually not the case. In the early days of the republic, Presidents removed judges quite regularly for not following the constitution. If we got back to that, then we wouldn't have ridiculous shenegans such as supreme court rulings based on "evolving standards".
The constitution isn't a wish list. It's an instruction book on how the government is to be run. If the constitution doesn't explicitly give the government a power, then the power returns to the people -- through their elected representatives.
If Democrats want there to be a super majority requirement to get judges in, then they should try to pass a new constitutional amendment and not play games with senate procedures.