<Li> United States Capitol </Li> <Li> Senate Reception Room </Li> <Li> Senate office buildings <Ul> <Li> (Dirksen </Li> <Li> Hart </Li> <Li> Russell) </Li> </Ul> </Li> <Ul> <Li> (Dirksen </Li> <Li> Hart </Li> <Li> Russell) </Li> </Ul>

Where is a filibuster made legal in the constitution