What is "benchwarmer"

Usage examples of "benchwarmer".

Harris, a modern liberal Commu-Nazi judicial benchwarmer, handle the American flag, which his forefathers (probably buried in the rubble under his courthouse) died to protect?

I'm no great fan of Frank Green, but as governor he'll be a good benchwarmer and won't undo what Marshall and I have accomplished.

Two other judges were also ill, either with the flu that was going around or with something else, so the remaining benchwarmers were swamped.