Conservative activists are sounding the alarm to counter efforts that the Republican platform could dilute anti-abortion language — a departure from decades of precedence.

In a preemptive move, a group of 10 anti-abortion leaders sent a letter to former President Donald Trump, pressuring him not to back away from language in the GOP platform against abortion. The drastic move is evidence of rising fear among conservatives that Trump’s consistent statements that abortion should now be left up to states after the fall of Roe v. Wade could become the national stance of the GOP.