Marc Short, the former chief of staff to Vice President Mike Pence, is a long-time Republican, but on Wednesday, even he couldn’t understand the strategy behind J.D. Vance’s attacks on Gov. Tim Walz (D-MN) ‘s 24-year military career. Vance, who served four years in the military and was a reporter for the Marines in Iraq, said Walz’s retirement came before his unit went to Iraq and another Minnesota man complained to the New York Post that he was sent in Walz’s place. Vance attacked Walz for “stolen valor” due to the report. Short called the comments a mistake because Vance moved the message fr…