Today, we are -79 to the Dems (257-178=79).
A 100 seat swing would put us at +21 (-79 + 100 = +21)
Your math would actually be a 200 seat swing from current status...going from -79 to +121 = a 200 seat swing.
ok, thanks.
That is exactly what Morris was saying, 100 fewer Democrats and 100 more Republicans.