Via Alexander Burns and Patrick Healy of the New York Times:
Gov. Scott Walker of Wisconsin has concluded he no longer has a path to the Republican presidential nomination and plans to drop out of the 2016 campaign, according to three Republicans familiar with his decision, who spoke on condition of anonymity.
Mr. Walker called a news conference in Madison at 6 p.m. Eastern time.
“The short answer is money,” said a supporter of Mr. Walker’s who was briefed on the decision. “He’s made a decision not to limp into Iowa.”
Image note: In the Beginning .... ― Wisconsin Gov. Scott Walker speaks at the American Action Forum, 30 January 2015, in Washington, D.C. Earlier in the week, Walker announced the formation of ‘Our American Revival’, a new committee designed to explore the option of a presidential bid in 2016. (Photo: Win McNamee/Getty Images)
Burns, Alexander and Patrick Healy. “Scott Walker Said to Be Quitting Presidential Race”. The New York Times. 21 September 2015.