Sen. Carl Levin has been a vocal advocate for transparency in political ad spending. Alex Wong/Getty Images hide caption toggle caption Alex Wong/Getty Images It's All Politics IRS To 'Social Welfare' Groups: Show Me The Political Ad Money March 30, 2013 • In a step toward fuller disclosure, the agency is asking more questions of the entities whose multimillion-dollar ad budgets helped clog the airwaves during election season.
