Republicans are split on whether their presidential contenders should embrace a federal 15-week ban on abortion as the party tries to find its footing on the issue going into 2024. In a radio ad released Thursday in Iowa, Sen. Tim Scott (R-S.C.) vowed to back a national 15-week ban on the procedure. That ad followed a call last week from former Vice President Mike Pence, who urged the other candidates to embrace a federal 15-week ban.