The country singer delivered the ballad, written by David Lynn Jones, with help from Willie's longtime sideman Mickey Raphael on harmonica Chris Stapleton is not one to make political statements. But it’s hard not to read into his Wednesday night appearance on The Late Show With Stephen Colbert . The Grammy-winning Nashville songwriter didn’t perform one of the countless country songs he’s written, but rather “Living in the Promiseland,” made famous by Willie Nelson. Written by David Lynn Jones, “Living in the Promiseland” is a pro-immigrant song about the American dream. Nelson cut it for his 1986 album The Promiseland and released it as a single, taking it all the way to Number One on the country charts. Onstage at Colbert , Stapleton offered a solo rendition of the ballad, backed only by Nelson’s longtime sideman, harmonica player Mickey Raphael, who played on the original recording.…