<Tr> <Td> </Td> <Td> Jacob Harold Gallinger </Td> <Td> February 16--March 4, 1913 </Td> <Td> President pro tempore (rotating) </Td> </Tr> <Tr> <Td> </Td> <Td> Thomas R. Marshall </Td> <Td> March 4, 1913--March 4, 1921 </Td> <Td> President of the Senate </Td> </Tr> <Tr> <Td> </Td> <Td> Calvin Coolidge </Td> <Td> March 4, 1921--August 2, 1923 </Td> <Td> President of the Senate </Td> </Tr> <Tr> <Td> </Td> <Td> Albert B. Cummins </Td> <Td> August 2, 1923--March 4, 1925 </Td> <Td> President pro tempore </Td> </Tr>

Who is the presiding officer of the house and senate