FORT WORTH, Texas (AP) — George P. Bush took the first step toward continuing his family's political dynasty Tuesday, shaking off an under-funded primary challenger and securing the Republican nomination for the little-known but powerful post of Texas land commissioner. The 37-year-old Fort Worth attorney is the grandson of former President George H.W. Bush, nephew of former President and Texas Gov. George W. Bush, and son of ex-Florida Gov. Jeb Bush, who is frequently mentioned as a possible GOP White House hopeful in 2016. He's also a Spanish speaker whose mother Columba was born in Mexico and who Republican leaders...