Hallo,
he performed on the Louisiana Hayride hosted by his close friend Jim Reeves and also went on one of the first Elvis Presley tours with Hank Snow, Jim Reeves and Johnny Cash, using Jim's band in all his performances.
Jack was close to Willie Nelson, who played the lead parts on a good number of Jack's recordings, which is a little known fact. Jack was close to Mrs. Jimmie Rodgers, and even recorded “Waitin' For A Train“, a copy of which is stored in a bank vault with no other recordings of that produced. Friends with Ray Price, the Libertos (Johnny Cash's San Antone family/inlaws), Jimmie Newman and Charlie Walker, plus a host of radio DJs, Jack was fond of his music industry friends, although not always happy about the state of the industry's relationships with its performers.
In the internet age, there's been some confusion between the black blues singer Jack Newman and Jack Newman the country singer. The former is famous from the 30's, when Jack was not yet ten years old, and the latter began his music career professionally in the 1950s. An interesting aside to this is that in Jack (Milton) Newman's music, you will find the word "blue" is more used than any other word, when all the songs are considered. But that's as close as it gets to the blues, which have been integral to country music at least since Jimmie Rodgers was singing “Blue Yodel #9“.
Gruß
Heino