<Ul> <Li> President Pro Tempore Emeritus Patrick Leahy (D) </Li> </Ul> <Li> President Pro Tempore Emeritus Patrick Leahy (D) </Li> <Ul> <Li> Majority Leader Mitch McConnell (R) </Li> </Ul> <Li> Majority Leader Mitch McConnell (R) </Li>

Who has formal constitutional power in most foreign affairs