ATLANTA — Georgia Republicans knew for months before Herschel Walker launched his Senate campaign that he would be a huge risk in one of the party’s most pivotal races. Just how much of a risk has become clear to many of them in recent weeks.
Mr. Walker has blundered through an array of missteps and has endured negative media coverage, raising questions about his past and fitness for the office.
He made exaggerated and untrue claims about…