Good explanation. Just one correction: John Thune is the Senate majority leader (so, the "head" of the Senate). Steve Scalise is in the House and he's the head of the Republican party in the House, whereas Mike Johnson (who is also a Republican) is the House majority leader (so the head of the whole House, not just his party).
So, it's Mike Johnson for the House and John Thune for the Senate.
So, it's Mike Johnson for the House and John Thune for the Senate.