<Tr> <Td> James J. Davis </Td> <Td> Wales </Td> <Td> Naturalization </Td> <Td> Republican </Td> <Td> Secretary of Labor </Td> </Tr> <Tr> <Td> John M. Deutch </Td> <Td> Belgium </Td> <Td> Derived </Td> <Td> Democratic </Td> <Td> Director of Central Intelligence </Td> </Tr> <Tr> <Td> William J. Duane </Td> <Td> Ireland </Td> <Td> Naturalization </Td> <Td> Democratic </Td> <Td> Secretary of the Treasury </Td> </Tr> <Tr> <Td> Albert Gallatin </Td> <Td> Switzerland </Td> <Td> Naturalization </Td> <Td> Democratic - Republican </Td> <Td> Secretary of the Treasury </Td> </Tr>

How many members of congress have dual citizenship