 The extent of AFP's political activities while operating as a tax-exempt entity has raised concerns among some campaign finance watchdogs regarding the transparency of its funding.Americans for Prosperity was founded in 2004 when internal rivalries caused a split in the conservative political advocacy group Citizens for a Sound Economy (CSE), creating Americans for Prosperity and FreedomWorks.AFP's founding was funded by businessmen and philanthropist brothers David H. Koch and Charles Koch, of Koch Industries.