Sanders invited to Vatican City

"The April 15 event, which will be hosted by the Pontifical Academy of Social Sciences [PASS], is scheduled to cover a number of the Democratic presidential hopeful's signature campaign issues, including income inequality and the environment."

There is some controversy on this trip as reported here.  The President of PASS said Sanders committed a "momumental discourtesy" for not contacting her office on the visit, instead getting the invitation directly from the Chancellor of PASS. She also said it was a political ploy.