The house leadership is divided between the Speaker of the House of Representatives, The majority floor leader, and the minority floor leader.
The speaker of the house is the only presiding officer and is the main spokesperson of the majority party in the House. He is also the third in line in the presidential succession.
The majority floor leader is the second to the Speaker, he is from a political party that controls the house and is elected.
The minority leader is also elected and works to win support for their propositions.
The leadership in the Senate is different. It’s divided between the Vice President, that is also the President of the Senate. He only shows up there when there is a crucial vote and he is responsible to cast the tiebreaking vote.
The President pro tempore is an honorary position and usually is given to a senator in the majority party with the longest continuous service.
There is also the majority and minority leaders.