David Brog is an American conservative activist, lawyer, author, and pro-Israel advocate renowned for his leadership in bridging evangelical Christian and Jewish support for Israel. Born on January 1, 1966, he earned a B.A. in Political Science from the University of Virginia in 1988 and a J.D. from Harvard Law School in 1991. He began his career as a litigator at the prominent law firm Sidley Austin LLP, practicing corporate law. In 1997, he transitioned to government service as Chief of Staff to U.S. Senator Sam Brownback (R-KS), serving until 2001 and focusing on policy issues including faith-based initiatives, international religious freedom, foreign policy, national security, and human rights, particularly concerning Israel and the Middle East. He later served as legislative director for Senator Jon Kyl and as chief of staff to U.S. Senator Jim DeMint.

From 2006 to 2016 (with some sources indicating service until 2018), Brog served as Executive Director of Christians United for Israel (CUFI), the largest pro-Israel organization in the United States, which boasts millions of members—growing to over seven million—primarily from the evangelical Christian community. In this role, he played a key part in mobilizing evangelical Christian support for Israel, organizing large-scale events like the annual CUFI Washington Summit, lobbying Congress for pro-Israel legislation, and launching educational campaigns to foster Christian Zionism and strengthen U.S.-Israel relations. Brog, who is Jewish, emphasized theological alignments between Christian and Jewish supporters of Israel. He authored the book 'Standing With Israel: Why Christians Support the Jewish State' in 2006, which became a key text in explaining evangelical motivations for supporting Israel based on biblical, historical, and strategic grounds.

After stepping down from CUFI, Brog has continued his advocacy through writing, speaking engagements, involvement in conservative think tanks and organizations, including executive roles at conservative nonprofits, and collaborations with figures like Yoram Hazony and ties to Dennis Prager. He remains a prominent voice in pro-Israel circles, critiquing policies perceived as anti-Israel and promoting alliances between faith-based groups. His efforts have been praised by supporters for bridging faith communities but criticized by some for promoting a specific ideological alignment in U.S. foreign policy. Brog's career reflects a blend of legal expertise, political strategy, and ideological commitment to conservatism and Zionism, influencing networks of evangelical, Jewish, and Republican influencers in American politics.