President-elect Trump announced Sunday he is tapping Callista Gingrich to serve as his ambassador to Switzerland. Gingrich, married to former Speaker Newt Gingrich (R-Ga.), was Trump’s ambassador to the Vatican during his first term in the White House. “I am pleased to announce Callista L. Gingrich will be our next United States Ambassador to Switzerland. Happily married to the Great Newt Gingrich, Callista previously served, with distinction, as my Ambassador to the Holy See,” Trump wrote in a post on Truth Social on Sunday.   Trump touted her work in her previous post. “During her tenure, Callista worked to advance and defend international religious freedom, combat human trafficking, and provide humanitarian assistance around the World,” he added. The former Speaker has been a vocal supporter of Trump for years and has been a critical voice in American politics for decades.