Stand Your Ground, whose backers remain unidentified, has poured funds into late midterm contests to erode gun-owner backing for Republicans. NBC News noted efforts in Florida’s 14th District against Kathy Castor, South Carolina’s 1st District with Nancy Mace, and Minnesota’s Senate contest pitting Michelle Tafoya against Peggy Flanagan. Minnesota materials from the group accuse Tafoya of favoring red-flag measures while leaving out Flanagan’s gun-restriction record and backing from Evertown, Giffords, and Brady.