<P> When debate concludes , the motion in question is put to a vote . In many cases , the Senate votes by voice vote ; the presiding officer puts the question , and Members respond either `` Aye ! '' ( in favor of the motion ) or `` No ! '' ( against the motion ) . The presiding officer then announces the result of the voice vote . Any senator , however , may challenge the presiding officer 's assessment and request a recorded vote . The request may be granted only if it is seconded by one - fifth of the senators present . In practice , however , senators second requests for recorded votes as a matter of courtesy . When a recorded vote is held , the clerk calls the roll of the Senate in alphabetical order ; each senator responds when his or her name is called . Senators who miss the roll call may still cast a vote as long as the recorded vote remains open . The vote is closed at the discretion of the presiding officer , but must remain open for a minimum of 15 minutes . If the vote is tied , the Vice President , if present , is entitled to a casting vote . If the Vice President is not present , however , the motion is resolved in the negative . </P>
<P> When debate concludes , the motion in question is put to a vote . In many cases , the Senate votes by voice vote ; the presiding officer puts the question , and Members respond either `` Aye ! '' ( in favor of the motion ) or `` No ! '' ( against the motion ) . The presiding officer then announces the result of the voice vote . Any senator , however , may challenge the presiding officer 's assessment and request a recorded vote . The request may be granted only if it is seconded by one - fifth of the senators present . In practice , however , senators second requests for recorded votes as a matter of courtesy . When a recorded vote is held , the clerk calls the roll of the Senate in alphabetical order ; each senator responds when his or her name is called . Senators who miss the roll call may still cast a vote as long as the recorded vote remains open . The vote is closed at the discretion of the presiding officer , but must remain open for a minimum of 15 minutes . If the vote is tied , the Vice President , if present , is entitled to a casting vote . If the Vice President is not present , however , the motion is resolved in the negative . </P>
when is the president of the senate allowed to vote
when is the president of the senate allowed to vote
If the vote is tied
If the vote is tied