The Filibuster A Senator can debate an issue for as long as he or she wants. There are no time limits. But each Senator may rise to debate an issue only once. The filibuster is a neat little procedural trick
Early last year, when the Senate was considering the nomination of Neil Gorsuch to the Supreme Court, I posted a long entry, explaining the workings of the filibuster in the Senate. You can read it at at the link. The filibuster.