CNN CNN Newsroom With Fredricka Whitfield September 20, 2015 20:16:00
>> reporter: that's right, jim. big changes. it really shows how significant this latest debate was in reshuffling the field and really changing the state of the republican nomination race besides who is up and who is down. what is most striking is the comparison to where this field was a month ago. donald trump is still the front-runner but he's on a downward slope. he's lost eight points in the past month. support slipping for ben carson who has lost five points. if you compare that to carly fiorina leaping up 12 points, that's a huge number. same goes for marco rubio. a big poijump for him ...