The majority of Republican senators on Thursday called on Health and Human Services Secretary Robert F. Kennedy Jr. to reconsider the approval of a new generic version of the abortion pill mifepristone.

Fifty GOP senators signed on to a letter written by Sen. Lindsey Graham (R-SC) calling on Kennedy and Food and Drug Administration Commissioner Marty Makary to “take decisive action to reevaluate whether this generic version of mifepristone is suitable to enter the market.”