By Randy Ellis, Staff WriterNearly a dozen Republican presidential candidates will converge on Oklahoma in two weeks when the Southern Republican Leadership Conference comes to Oklahoma City. There will be American business leaders, too, like T. Boone Pickens, a Texas energy industry entrepreneur and Oklahoma State University benefactor, who is planning to celebrate his 87th birthday at the conference, officials said. “This is definitely a historic political event,” said Estela Hernandez, state vice chairperson for the Oklahoma Republican Party.Read more on NewsOK.com