To write an abstract, start with a short paragraph that explains the purpose of your paper and what it's about. Then, write a paragraph explaining any arguments or claims you make in your paper. Follow that with a third paragraph that details the research methods you used and any evidence you found for your claims.
Filibustering is a method that Senators can use to stall or prevent a vote on a particular bill. Although not quite common nowadays, it has been used many times in the past.