here's cbs' nicole killion. >> thank you, guys. >> reporter: in his first public campaign event sincembshell reports by "the daily beast," herschel walker played defense. >> this is false. it's a lie. >> reporter: he doubled down after the woman who alleged he paid for her abortion in 2009 also had a child with him. >> if i knew about it, i would be honest and talk about it, but i know nothing about it. >> reporter: according to the latest report, the woman says she came forward after walker's repeated denials. >> have you figured out who it is? >> not at all. >> reporter: she said i've been very civil so far, i keep my mouth shut, adding, he didn't accept responsibility for the kid we did have together and now he's not accepting responsibility for the one de responsibility for the one d we didn't have. the woman provided a receipt from an abortion clinic and a get well card and a $700 check signed by walker. >> everything has been a lie! >> reporter: after his son called him out on social media, walker told reporters he's not concerned. >> i'll always love him, no matter what my son

cbs' nikole killion was at the first and only confirmed debate between incumbent raphael warnock and republican herschel walker last night. nicole, did the debate change any minds? >> reporter: adriana, early voting starts here in georgia monday. some voters we talked to said they haven't made up their minds but many have and they say this debate solidified some of the opinions they already had. herschel walker was riding high after the georgia senate debate. >> so i brought something and senator left so fast last night that i didn't get a chance to give it to him. but i got a team biden t-shirt. >> reporter: the gop challenger continued to tie democratic incumbent senator rauf nel warnock to president biden after clashing friday night over everything from the economy to abortion rights. >> i believe in life. and i tell people this. georgia is a state that respects life, and i'll an senator that protects life. >> he says no exceptions. even in the case of rape, incest, or the life of the mother. i think that's extreme. >> reporter: walker was confronted again about reports he allegedly paid for a woman's abortion in 2009. my opp