<Tr> <Td> Union member </Td> <Td> 76 </Td> <Td> </Td> <Td> 51 </Td> <Td> 62 </Td> <Td> 77 </Td> </Tr> <Tr> <Td> Not union </Td> <Td> 42 </Td> <Td> </Td> <Td> 35 </Td> <Td> 44 </Td> <Td> 56 </Td> </Tr> <Tr> <Td> Protestant </Td> <Td> 43 </Td> <Td> 37 </Td> <Td> 37 </Td> <Td> 38 </Td> <Td> 55 </Td> </Tr> <Tr> <Td> Catholic </Td> <Td> 62 </Td> <Td> 56 </Td> <Td> 51 </Td> <Td> 78 </Td> <Td> 76 </Td> </Tr>

Why did political support for the new deal decline