CNN CNN Newsroom With Carol Costello September 1, 2015 13:06:00
He's sort of mounted this quiet ground game in iowa and as a result has been able to catch up with donald trump and take the wind out of the sales ilsails o like scott walker. >> ben carson isn't the only one showing a steep reversal in support either, right? >> if you look at their numbers, they're almost in reverse. in july walker was at 22%. now he's at 7%. a lot of that support may be going to carson. it was huckabee before. it was santorum as well who was able to galvanize evangelicals. that looks like what carson is able to do at this point. if you're scott walker, you've got to be worri...