The filibuster is Unfathomable, and Obscure. It is complicated and therefore understood or known by only a few people. 
Filibuster is a tactic used in the United States Senate to prevent a measure from being brought to a vote by means of obstruction. The most common form occurs when one or more senators attempt to delay or block a vote on a bill by extending debate on the measure.
The Senate can overcome a filibuster if it invokes cloture — a vote by 60 members of the Senate to place a 30-hour time limit on consideration of a bill or other matter.
Cloture, adopted as Rule 22 in 1917, used to require a two-thirds majority vote. However, due to the difficulty of obtaining a two-thirds vote, the Senate changed the rule in 1975 and reduced the number of votes required to three-fifths (or 60).
In 2005 Republican Senate Majority Leader Bill Frist threatened to use the nuclear option to end Democratic-led filibusters of judicial nominees submitted by President George W. Bush. And in July 2013, Democratic Senate Majority Leader Harry Reid threatened its use to stop Republicans from filibustering President Barack Obama’s executive-branch nominees.
Senators have never successfully made good on their threat to invoke the nuclear option and bring an end to the filibuster, but if they did, it could have huge consequences for the future of the Senate and the ability to keep the majority in check.
In November 2013, Senate Democrats led by Harry Reid used the nuclear option to eliminate the 60-vote rule on executive branch nominations and federal judicial appointments. In April 2017, Senate Republicans led by Mitch McConnell extended the nuclear option to Supreme Court nominations in order to end debate on the nomination of Neil Gorsuch.[2][3] McConnell loves the filibuster when it suits his purpose.
Filibuster is called respect for the minority. And this is called democracy in America.