I keep hearing about the important role of Federal Judges in the United States and how their rulings as a whole results in them being labeled as a judge with a particular political worldview (the most common being the eponymous "Liberal" or "conservative"). And the way a particular judge rules is apparently significant enough that organizations such as The Federalist Society have been formed that foster the appointment of judges that rule in a particular way and Senate Majority Leader Mitch McConnell has done numerous procedural measures to aid said society
There is one question embedded within two here:
What is the actual political spread of federal judges based on their rulings, and...
How is this spread effectively measured?