Peppered among the lush green oak and palm trees of the Rio Grande Valley, a mostly Hispanic region along the U.S.-Mexico border that has voted solidly Democratic, there are Republican outposts popping up. The Hidalgo County GOP headquarters was busy on the mid-September day when CBS News knocked on its doors in McAllen, Texas. The foyer was filled with candidate signs and stickers from a slate of Republican candidates. Inside, Hidalgo County GOP Chair Adrienne Pena-Garza was running a phone bank for GOP candidates – something she says was unheard of just a few election cycles ago. "Family, faith and freedom. I mean, that's the messaging that's been working for us," Pena-Garza said in an interview airing on the special "CBS Reportes: El Poder" streaming on CBS News. A similar slogan worked for newly elected Rep. Mayra Flores, who became the first Mexican-born woman sworn into Congress in June. Her campaign, with the help of the GOP, spent over a million dollars. "God, Family, Country"