The WKSH Wikipedia entry says
"in March 2014, [former owner] Disney instead filed to sell the station to Starboard Media Foundation, which broadcasts Catholic programming on its stations through the Relevant Radio network. WKSH will be the network's second station in the market; Relevant Radio already serves Milwaukee's northern suburbs on WSJP-FM (100.1 FM)."
Formerly WPJP for Pope John Paul, now with call letters canonized. WKSH will become WSJP-AM as a sister station. The CUF Milwaukee April 2014 newsletter adds that
"According to a recent announcement by Fr. Rocky Hoffman, JCD, Executive Director of Relevant Radio, the station is moving ahead with plans to purchase station WSJP, 1640 AM, 'which will more than quadruple our listening reach in southeast Wisconsin to 2.4 million people!' Fr. Rocky happily announced, 'I have good news for you in Milwaukee!!' He indicated that 'we should be up and running by late April or May!'"
Also available since last year, at least in the southern reaches of the Milwaukee metropolitan area, is WSFI 88.5 FM out of Antioch, Illinois, an EWTN affiliate.
Relevant Radio acquires WKSH 1640 AM Sussex
via The Provincial Emails