During that time it was also the initials of “Old Kinderhook”, which was the nickname of US President Martin van Buren[1]. His slogan was “Vote for OK” and cong

During that time it was also the initials of “Old Kinderhook”, which was the nickname of US President Martin van Buren[1]. His slogan was “Vote for OK” and congresman might ask “Did you get OK?” (Was this approved by Van Buren?). [1] https://www.smithsonianmag.com/smart-news/how-one-man-discovered-the-obscure-origins-of-the-word-ok-180953258/ https://www.smithsonianmag.com/smart-news/how-one-man-discov...