Sometimes the rules are not a simple majority, and that is why I asked. To use a fairly recent and depressing example, it was necessary to get 60 votes for conviction in Clinton's impeachment trial; 51 was not enough to convict.
I just want to know what the Senate rules actually are. Do you KNOW if it is simply a majority, or are you assuming it is so?
I'm POSITIVE that it is a simple majority in the Republican Caucus to decide leadership.
The 2/3rds majority to convict in an impeachment is Constitutionally mandated.