Idaho Republicans rejected an amendment to their party platform that would have allowed abortion to save a mother's life.

A 2020 law banning abortions except in cases of reported rape or incest or to protect the mother's life is set to take effect in the deeply conservative state 30 days after the U.S. Supreme Court overturned its landmark Roe v. Wade ruling on June 24.

At the Idaho GOP convention in Twin Falls on Saturday, delegates approved changes to the party platform that criminalize all abortions without exceptions for rape, incest or to save the life of the mother, according to Idaho Reports.

Delegates voted 412-164 to reject an amendment that would have allowed an exception if the mother's life was in "lethal danger."

The platform states: "We affirm that abortion is murder from the moment of fertilization. All children should be protected regardless of the circumstances of conception, including persons conceived in rape and incest."

Scott Herndon, a Republican candidate who is running unopposed for the Idaho Senate, argued against the exception being included.

"For the last 49 years we have essentially lost the argument in the culture because we have focused on abortion as the termination of a pregnancy and not the termination of a living human being," Herndon told delegates, the Idaho Capital Sun reported.

"We will never win this human rights issue, the greatest of our time, if we make allowances for the intentional killing of another human being."