<Tr> <Th> Service branches </Th> <Td> United States Army United States Marine Corps United States Navy United States Air Force United States Coast Guard </Td> </Tr> <Tr> <Th> Headquarters </Th> <Td> The Pentagon, Arlington County, Virginia, U.S. </Td> </Tr> <Tr> <Th_colspan="2"> Leadership </Th> </Tr> <Tr> <Th> Commander - in - Chief </Th> <Td> President Donald Trump </Td> </Tr>

How many members of congress have served in the armed forces