The filibuster is often painted as an archaic Senate rule carved in stone. In reality, it's evolved over time.Why it matters: Washington’s attention has been fixed to the filibuster amid a 50-50 Senate and critical debates over infrastructure and voting rights. Proponents bill it as a crucial fixture designed to protect the minority; critics pillory it as a tool of obstruction.Stay on top of the latest market trends and economic insights with Axios Markets. Subscribe for freeTalk of changing it