Pres­i­dent Don­ald Trump's new nom­i­nee to lead the FDA, Hei­di Over­ton, is set to tes­ti­fy be­fore sen­a­tors in her con­fir­ma­tion hear­ing Thurs­day. Re­plac­ing pushed-out pre­de­ces­sor Mar­ty Makary, Over­ton is ex­pect­ed to be grilled by the Sen­ate HELP Com­mit­tee on nu­mer­ous top­ics from her par­tic­i­pa­tion in Trump's vac­cines ex­ec­u­tive or­der last month to the agen­cy's safe­ty re­view of the abor­tion pill mifepri­s­tone...