From Wikipedia:
“McConnell is of Scots-Irish and English descent, the son of Addison Mitchell McConnell, and his wife, Julia (née Shockley). McConnell was born on February 20, 1942, in Sheffield, Alabama, and raised as a young child in nearby Athens.”
“As a youth, McConnell overcame polio,[14] which he was struck with at age 2.[15] He received treatment at the Warm Springs Institute in Georgia, which potentially saved him from being disabled for the rest of his life.[16] In 1990, McConnell said that his family “almost went broke” because of costs related to his illness.”
https://en.wikipedia.org/wiki/Mitch_McConnell