I can't find anything so far in the Senate rules about how the Majority Leader is selected, so it may well be that that vote is taken independently in each party's caucus. However, the Senate rules are very clear that committee chairmen are chosen by the [b]whole[/b] Senate. See [url]http://rules.senate.gov/senaterules/rule24.htm[/url]. The Senate rules require an organizing resolution to choose committee chairmen. I can't find the resolution that chose the current Senate committee chairmen, but the one that chose the chairmen for January, 2001, was [url=http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=107_cong_bills&docid=f:sr7ats.txt]S. Res. 7[/url], which was "agreed to by the Senate". There was no roll call vote because the outcome was negotiated ahead of time, but you can bet if they tried to exclude the independents from this process, they would ask for a roll call vote. The Senate can't pass resolutions and exclude Senators from voting on them because of their party. It's true that all the real negotiations happen before the vote, so the vote on the resolution is meaningless, but that's only because everyone knows how everyone would vote if there was a real vote. It's not because Independents are excluded from voting on Senate organizing resolutions.