Media Fortitude Partners — a revolutionary media buying agency — will combine traditional and evolving digital platforms to efficiently and effectively win political campaigns from local to national levels.

MFP uses the next generation of media buying solutions and targeting technology to achieve each of our clients’ goals, particularly in the political realm.




We have over two decades of media planning and buying expertise. MFP creatively and diligently works to meet any advertising need — across Broadcast, Cable, Radio, Digital, Outdoor and Transit. Services include but are not limited to:

Strategic Media Planning

Media Placement & Buying

Competitive Research & Analysis

Precision Targeting and Mapping

Print Production

Campaign Reconciliation



We have worked across most of the U.S. — in 43 states and the District of Columbia.





Leah Casterlin

Founding Partner

With 16+ years of experience in political media buying, Leah was one of the first political buyers to embrace digital media in 2012, when most campaigns chose to stick only to traditional media. She executed the first political addressable cable buy in New Jersey, and the first political addressable buy in the U.S. for Comcast. Recently, Leah planned and successfully executed a digital-only campaign for Rutgers University. Leah is also skilled in the creative, production, and direct mail process. Having worked for a small firm for most of her career, she is also well versed in how to run a business. Graduate of Rutgers University (B.A., Political Science, Journalism).

Carolyn Xu

Founding Partner

Since her start at Katz Media Group, a division of iHeartMedia, Carrie has accumulated 8+ years of experience executing general and political campaigns in over 200 U.S. markets. She has also worked with agencies including MediaVest, McCann-Erickson, and GroupM, and developed traditional and non-traditional media campaigns for E! Entertainment Television, XFINITY, General Motors, and Warner Bros. She brings experience overseeing financials, hiring, training, and daily operations of a small firm. Graduate of The Pennsylvania State University (B.A., Telecommunications - Public Relations and Mass Media).