The Senate tradition of unlimited debate has allowed for the use of the filibuster, a loosely defined term for action designed to prolong debate and delay or prevent a vote on a bill, resolution, amendment, or other debatable question.
Both sides have engaged in filibusters. Why was President George W. Bush unable to enact an immigration overhaul? Filibuster. Why was President Barack Obama unable to enact climate change legislation? Filibuster. Why can't Democrats today pass a voting rights bill? Filibuster. Learn more about the concept and its history in the article here.