Wisconsin Gov. Scott Walker will announce Monday evening that he is dropping out of the 2016 presidential race, CBS News' John Dickerson has confirmed.
Walker scheduled a press conference in Madison, Wisconsin, at 6 p.m. EST, just two hours in advance. The New York Times first reported that he would be dropping out.
He was one of the last Republicans to enter the race, waiting until Wisconsin had wrapped up state business and announcing his campaign in mid July. At the time, Walker promised that his record in the state - stripping away union power, lowering taxes, passing pro-life legislation and more - showed that he knew how to "fight and win for America."
In January, before entering the presidential race, Walker looked like he could be a serious competitor in Iowa, where voters hold the first nominating contest of the primary election cycle. Republican operatives in the state were impressed with the way he fired up the state's grassroots social conservative activists at the Iowa Freedom Summit.
But after he entered the race, his poll numbers began to drop and mediocre performances in the GOP debates failed to impress his backers. In a CNN/ORC poll released over the weekend, following the second debate in Simi Valley, California, Walker showed the most precipitous drop. He was part of a group of five candidates that received less than one half of 1 percentage point support.
CBS News' Major Garrett reported that the Walker campaign was reviewing internal polling data that tracked with the CNN poll, meaning the campaign's internal numbers were also very bad.
As recently as early August, Walker was sitting in second or third place in the polls behind former Florida Gov. Jeb Bush and businessman Donald Trump.