Oklahoma would automatically ban abortions if the U.S. Supreme Court overturns its landmark 1973 ruling that legalized abortion nationwide under a bill that has cleared a Senate panel.

While abortion opponents chanted, prayed and sang hymns outside the committee room, the Senate Health and Human Services Committee voted 11-4 on Monday for the so-called “trigger” abortion ban . Similar bills already have passed in Arkansas, Louisiana, Mississippi, North Dakota and South Dakota.

Many of the abortion opponents were upset that a separate bill by Republican Sen. Joseph Silk to make abortion a felony crime was not granted a hearing.

Oklahoma state Sen. Greg Treat, R- Oklahoma City, President Pro Tempore, answers a question during a news conference Monday, Feb. (AP Photo/Sue Ogrocki)
Oklahoma state Sen. Greg Treat, R- Oklahoma City, President Pro Tempore, answers a question during a news conference Monday, Feb. (AP Photo/Sue Ogrocki)

Senate President Pro Tem Greg Treat described Silk’s bill as a dangerous precedent by a state to ignore a U.S. Supreme Court ruling.

Oklahoma state Senator Joseph Silk, R-Broken Bow,, addresses an abortion opponents rally Monday, Feb. (AP Photo/Sue Ogrocki)
Oklahoma state Senator Joseph Silk, R-Broken Bow,, addresses an abortion opponents rally Monday, Feb. (AP Photo/Sue Ogrocki)
Abortion opponents cheer for a speaker at a rally Monday, Feb. 25, 2019, at the state Capitol in Oklahoma City. (AP Photo/Sue Ogrocki)
Abortion opponents cheer for a speaker at a rally Monday, Feb. 25, 2019, at the state Capitol in Oklahoma City. (AP Photo/Sue Ogrocki)
Oklahoma state Senator Joseph Silk, R-Broken Bow speaks during a news conference Monday, Feb. 25, 2019, in Oklahoma City. (AP Photo/Sue Ogrocki)
Oklahoma state Senator Joseph Silk, R-Broken Bow speaks during a news conference Monday, Feb. 25, 2019, in Oklahoma City. (AP Photo/Sue Ogrocki)
Oklahoma state Senator Joseph Silk, R-Broken Bow, left, debates with Oklahoma state Sen. Greg Treat, R- Oklahoma City, President Pro Tempore, right, on the best way to ban abortion in Oklahoma during a Senate committee meeting Monday, Feb. (AP Photo/Sue Ogrocki)
Oklahoma state Senator Joseph Silk, R-Broken Bow, left, debates with Oklahoma state Sen. Greg Treat, R- Oklahoma City, President Pro Tempore, right, on the best way to ban abortion in Oklahoma during a Senate committee meeting Monday, Feb. (AP Photo/Sue Ogrocki)
Anti-abortion protestors line the hallway to a Senate committee meeting room where an anti-abortion measure is schedule to be discussed Monday, Feb. (AP Photo/Sue Ogrocki)
Anti-abortion protestors line the hallway to a Senate committee meeting room where an anti-abortion measure is schedule to be discussed Monday, Feb. (AP Photo/Sue Ogrocki)