I should have clarified myself prior; Bolton and Estrada were both formally filibustered because they failed to clear cloture.
As for the intent of Bolton's filibuster, if I was a betting man, I would put my money on the (D)s intent to kill the nomination, disguised as a fishing expedition...
Except I would change "intent of the filibuster" in your sentence to "intent of the refusal to vote." Sometime refusing to vote is honorable, because the person hasn't enough information to decide, or hasn't had an opportunity to persude others to see things his way.
When refusing to vote is done to stall the matter, THAT is but ONE form of filibuster.
And we agree that the DEMs refusal to vote on judicial nominees and Bolton is designed to kill the nomination.
"As for the intent of Bolton's filibuster, if I was a betting man, I would put my money on the (D)s intent to kill the nomination, disguised as a fishing expedition..."
Gee, ya think? Sorry, that sounds facetious. I am venting so please excuse the tone of voice :)