Marianne Sparta, sports a "I Voted Today" sticker after placing her ballot at the Weccacoe Playground with her 2 year old grandson during Primary Special election in Philadelphia, Pennsylvania on May 19, 2015. Campaign finance watchdog groups fear heavy spending by ultra-rich Americans will warp the election - already expected to be the most money-soaked in history - and prop up candidates who don't represent the will of the majority. Photo taken May 19, 2015. REUTERS/Mark Makela