As President of the
American Jewish Congress (AJCongress), Rosen has been vocal as a Jewish community advocate and public figure. He has focused the organization's efforts on defending Israel and the rights of the Jewish people, as well as opposing
anti-Semitism, the delegitimization of the
State of Israel, and the
BDS (Boycott, Divestment, and Sanctions) movement. He has also advocated for a range of political initiatives, and in 2019 led the push for the establishment of a Congressional Jewish Caucus. In early June 2019, a Black-Jewish Caucus was created in Congress.
International Mayors Conference Rosen leads the International Mayors Conference, hosted by the American Jewish Congress in partnership with the Government of Israel, which brings together mayors from cities around the world in Israel. The 33rd International Mayors Conference took place in Israel in February 2019. Past participants include
Mayor of New York City Bill de Blasio,
President of El Salvador Nayib Bukele,
President of Argentina Mauricio Macri,
Premier of Taiwan William Lai, and former
Prime Minister of Italy Matteo Renzi. The Mayors Conference also features prominent Israeli politicians and mayors, including
Prime Minister Benjamin Netanyahu. ==Social activism==