I believe the Majority Leader is selected by the party, not by the Senate as a whole. In that case, 27 votes would replace him. The difference in Senate Leader and Speaker of the House is that the Constitution requires a Speaker of the House while the Senate Leader is a position provided by Senate rules.
Unfortunately I’m guessing 51.
I believe the Majority Leader is selected by the party, not by the Senate as a whole. In that case, 27 votes would replace him. The difference in Senate Leader and Speaker of the House is that the Constitution requires a Speaker of the House while the Senate Leader is a position provided by Senate rules.