A '''roll call vote''' is a vote in which each [[Senator]] votes "yea" or "nay" as his or her name is called by the Clerk, so that the names of Senators voting on each side are recorded. Under the [[Constitution]], a roll call vote must be held if demanded by one-fifth of a quorum of Senators present, a minimum of 11.
+
A '''roll call vote''' is a vote in which each [[Senator]] votes "yea" or "nay" as his or her name is called by the Clerk, so that the names of Senators voting on each side are recorded. Under the [[Constitution]], a roll call vote must be held if demanded by one-fifth of a quorum of Senators present, a minimum of 11.<ref>[http://www.senate.gov/reference/glossary_term/appropriation.htm] US Senate Reference</ref>