A woman attends a "Women Betrayed Rally to Defund Planned Parenthood" on Capitol Hill on July 28. (Carlos Barria / Reuters) Following the release a series of pro-life sting videos targeting Planned Parenthood, Republican senators are threatening to defund the family-planning provider. A vote on their bill to strip Planned Parenthood of federal funding—which accounts for 40 percent of the organization’s budget—could come as early as Monday.