Filibusters Are Unconstitutional
Yes, the title is provocative, intentionally, and could be hedged in "ifs," "ands," "buts," and innumerable other qualifiers; but I'll stick with it on this simple ground: nowhere in the United States Constitution is a 60-vote majority required to end debate on a bill. Two-thirds majorities are required only in a few specified instances. Search the Constitution yourself if you don't believe me.