Mitch McConnell has condemned Democratic rival Chuck Schumer, who said Republicans and Supreme Court justices who support overturning landmark abortion rights would "pay the price".

Speaking on the Senate floor on Thursday, the Senate Majority Leader said "there is nothing to call this except a threat, and there's absolutely no question to whom it is directed", suggesting that if Senator Schumer had shouted his remarks to another American outside their workplace, "they would hear them as threatening or inciting violence."

He said: "No matter the intention, words carrying the apparent threat of violence can have horrific unintended consequences,

Senator Schumer addressed abortion rights demonstrators on the steps of the Supreme Court on Wednesday, as the high court began arguments in the first abortion-related case under Donald Trump's administration, which has supported efforts to overturn women's access to abortion without excessive government intervention.

The president's appointment of two conservative justices now gives the court a conservative majority.

In June Medical Services LLC v Russo, the court will hear a challenge to a Louisiana law requiring doctors that perform abortions have admitting privileges in nearby hospitals, which opponents say effectively prevents people from seeking a termination in a state where two of its three remaining clinics - all hundreds of miles apart - could close under the rule. The state also imposes several other restrictive measures opponents say make it excessively difficult to get the procedure.

Louisiana's law is similar to a Texas law that the Supreme Court struck down in 2016 after justices rules the policy was too restrictive. Plaintiffs in the 2020 case argue that a reversal of that 2016 decision would not be justified.

Chuck Schumer slams Supreme Court for abortion rights case

Mr Schumer told protesters that legislatures attempting similar moves to restrict abortion rights "have released the whirlwind, and you will pay the price ... You won't know what hit you if you go forward with these awful decisions."

Mr McConnell used Mr Schumer's remarks to condemn Democrats, who he accuse of coordinating a "left-wing attack on the judiciary."

The justices "do not and must not serve at the pleasure of angry partisans" and "do not need to pay any mind to unhinged threats as shameful as they may be," he said.

His remarks come less than a week after the president attacked liberal justices Sonya Sotomayor and Ruth Bader Ginsburg, who Mr Trump demanded recuse themselves from any court challenges to his administration.

In her dissent to the court's recent decision to lift an injunction on the president's immigrant "public charge" rule, Justice Sotomayor said the court was disproportionately granting stay requests from the administration over other emergency appeals.

Mr Trump had also appeared to threaten the Supreme Court justice, saying that "she's trying to shame people with perhaps a different view into voting her way and that's so inappropriate, so let's see what happens."

Protests across US after abortion laws enforced Show all 20 1 /20 Protests across US after abortion laws enforced Protests across US after abortion laws enforced Missouri Thousands of demonstrators march in support of Planned Parenthood and pro-choice as they protest a state decision that would effectively halt abortions by revoking the license of the last center in the state that performs the procedure, during a rally in St. Louis, Missouri, May 30, 2019. (Photo by SAUL LOEB / AFP) (Photo credit should read SAUL LOEB/AFP/Getty Images) SAUL LOEB AFP/Getty Protests across US after abortion laws enforced Alabama MONTGOMERY, AL - MAY 19: Lindsey Shelton participates in a rally against one of the nation's most restrictive bans on abortions on May 19, 2019 in Montgomery, Alabama. Demonstrators gathered to protest HB 314, a bill passed by the Alabama Legislature last week making almost all abortion procedures illegal. (Photo by Julie Bennett/Getty Images) Julie Bennett Getty Protests across US after abortion laws enforced New York Alison Hickerson from New York City poses for a photo as she take part in a rally in front of the Middle Collegiate Church in the East Village of New York May 21, 2019. - Demonstrations were planned across the US on Tuesday in defense of abortion rights, which activists see as increasingly under attack. The "Day of Action" rallies come after the state of Alabama passed the country's most restrictive abortion ban, prohibiting the procedure in all cases, even rape and incest, unless the mother's life is at risk. Alabama is among about 14 states which have adopted laws banning or drastically restricting access to abortion, according to activists. (Photo by TIMOTHY A. CLARY / AFP) (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images) TIMOTHY A. CLARY AFP/Getty Protests across US after abortion laws enforced Georgia ATLANTA, GA - MAY 21: Melissa Simpson holds up her arm with "My Body My Choice" written on it during a protest against recently passed abortion ban bills at the Georgia State Capitol building, on May 21, 2019 in Atlanta, United States. The bill would ban abortion when a fetal heartbeat is detected. The Alabama abortion law, signed by Gov. Kay Ivey last week, includes no exceptions for cases of rape and incest, outlawing all abortions except when necessary to prevent serious health problems for the woman. Though women are exempt from criminal and civil liability, the new law punishes doctors for performing an abortion, making the procedure a Class A felony punishable by up to 99 years in prison. (Photo by Elijah Nouvelage/Getty Images) Elijah Nouvelage Getty Protests across US after abortion laws enforced Atlanta ATLANTA, GA - MAY 21: Women hold signs during a protest against recently passed abortion ban bills at the Georgia State Capitol building, on May 21, 2019 in Atlanta, Georgia. The Georgia "heartbeat" bill would ban abortion when a fetal heartbeat is detected. The Alabama abortion law, signed by Gov. Kay Ivey last week, includes no exceptions for cases of rape and incest, outlawing all abortions except when necessary to prevent serious health problems for the woman. Though women are exempt from criminal and civil liability, the new law punishes doctors for performing an abortion, making the procedure a Class A felony punishable by up to 99 years in prison (Photo by Elijah Nouvelage/Getty Images) Elijah Nouvelage Getty Protests across US after abortion laws enforced Alabama Pro-Choice protesters march through the streets of Birmingham, Alabama, during the March For Reproductive Freedom on May 19, 2019. - The state of Alabama passed a near-total abortian ban on May 14, 2019, one of the nation's most restrictive bans on abortions in decades. (Photo by Seth HERALD / AFP) (Photo credit should read SETH HERALD/AFP/Getty Images) SETH HERALD AFP/Getty Protests across US after abortion laws enforced Missouri ST LOUIS, MO - MAY 31: Pro-Choice supporters, along with Planned Parenthood staff celebrate and rally outside the Planned Parenthood Reproductive Health Services Center on May 31, 2019 in St Louis, Missouri. A judge has issued an order allowing Missouri's only abortion clinic to continue providing the service and maintaining their license until June 4. (Photo by Michael Thomas/Getty Images) Michael Thomas Getty Protests across US after abortion laws enforced Alabama Pro-Choice protesters march through the streets of Birmingham, Alabama, during the March For Reproductive Freedom on May 19, 2019. - The state of Alabama passed a near-total abortian ban on May 14, 2019, one of the nation's most restrictive bans on abortions in decades. (Photo by Seth HERALD / AFP) (Photo credit should read SETH HERALD/AFP/Getty Images) SETH HERALD AFP/Getty Protests across US after abortion laws enforced Georgia ATLANTA, GA - MAY 21: People hold signs during a protest against recently passed abortion ban bills at the Georgia State Capitol building, on May 21, 2019 in Atlanta, Georgia. The Georgia "heartbeat" bill would ban abortion when a fetal heartbeat is detected. The Alabama abortion law, signed by Gov. Kay Ivey last week, includes no exceptions for cases of rape and incest, outlawing all abortions except when necessary to prevent serious health problems for the woman. Though women are exempt from criminal and civil liability, the new law punishes doctors for performing an abortion, making the procedure a Class A felony punishable by up to 99 years in prison (Photo by Elijah Nouvelage/Getty Images) Elijah Nouvelage Getty Protests across US after abortion laws enforced Georgia ATLANTA, GA - MAY 21: Melissa Simpson snaps her fingers in support of a speaker during a protest against recently passed abortion ban bills at the Georgia State Capitol building, on May 21, 2019 in Atlanta, Georgia. The Georgia "heartbeat" bill would ban abortion when a fetal heartbeat is detected. The Alabama abortion law, signed by Gov. Kay Ivey last week, includes no exceptions for cases of rape and incest, outlawing all abortions except when necessary to prevent serious health problems for the woman. Though women are exempt from criminal and civil liability, the new law punishes doctors for performing an abortion, making the procedure a Class A felony punishable by up to 99 years in prison (Photo by Elijah Nouvelage/Getty Images) Elijah Nouvelage Getty Protests across US after abortion laws enforced Missouri Thousands of demonstrators march in support of Planned Parenthood and pro-choice as they protest a state decision that would effectively halt abortions by revoking the license of the last center in the state that performs the procedure, during a rally in St. Louis, Missouri, May 30, 2019. (Photo by SAUL LOEB / AFP) (Photo credit should read SAUL LOEB/AFP/Getty Images) SAUL LOEB AFP/Getty Protests across US after abortion laws enforced Washington, DC WASHINGTON, DC - MAY 23: People wait for the start of a news conference regarding womenâ€™s health care, on Capitol Hill May 23, 2019 in Washington, DC. The news conference was held to discuss the reintroduction of the "Women's Health Protection Act " and address the state-based attacks on abortion rights. (Photo by Mark Wilson/Getty Images) Mark Wilson Getty Protests across US after abortion laws enforced Louisiana Handsmaid themed protesters stand outside Jackson Square in the French Quarter of New Orleans, Louisiana, on May 25, 2019, to protest the proposed Heartbeat Bill that will ban abortion after 6 weeks in that state, scheduled for a vote on May 28. (Photo by Emily KASK / AFP) (Photo credit should read EMILY KASK/AFP/Getty Images) EMILY KASK AFP/Getty Protests across US after abortion laws enforced Louisiana Handsmaid themed protesters march down Bourbon Street in the French Quarter of New Orleans, Louisiana, on May 25, 2019, to protest the proposed Heartbeat Bill that will ban abortion after 6 weeks in that state scheduled for a vote on May 28. (Photo by Emily KASK / AFP) (Photo credit should read EMILY KASK/AFP/Getty Images) EMILY KASK AFP/Getty Protests across US after abortion laws enforced Missouri Thousands of demonstrators march in support of Planned Parenthood and pro-choice as they protest a state decision that would effectively halt abortions by revoking the license of the last center in the state that performs the procedure, during a rally in St. Louis, Missouri, May 30, 2019. (Photo by SAUL LOEB / AFP) (Photo credit should read SAUL LOEB/AFP/Getty Images) SAUL LOEB AFP/Getty Protests across US after abortion laws enforced Missouri TOPSHOT - Thousands of demonstrators march in support of Planned Parenthood and pro-choice as they protest a state decision that would effectively halt abortions by revoking the license of the last center in the state that performs the procedure, during a rally in St. Louis, Missouri, May 30, 2019. (Photo by SAUL LOEB / AFP) (Photo credit should read SAUL LOEB/AFP/Getty Images) SAUL LOEB AFP/Getty Protests across US after abortion laws enforced Missouri Pro-choice supporters and staff of Planned Parenthood hold a rally outside the Planned Parenthood Reproductive Health Services Center in St. Louis, Missouri, May 31, 2019, the last location in the state performing abortions, after a US Court announced the clinic could continue operating. - A US Court on May 31, 2019 blocked Missouri from closing the clinic. (Photo by SAUL LOEB / AFP) (Photo credit should read SAUL LOEB/AFP/Getty Images) SAUL LOEB AFP/Getty Protests across US after abortion laws enforced Washington, DC Abortion rights activists rally in front of the US Supreme Court in Washington, DC, on May 21, 2019. - Demonstrations were planned across the US on Tuesday in defense of abortion rights, which activists see as increasingly under attack. The "Day of Action" rallies come after the state of Alabama passed the country's most restrictive abortion ban, prohibiting the procedure in all cases, even rape and incest, unless the mother's life is at risk. Alabama is among about 14 states which have adopted laws banning or drastically restricting access to abortion, according to activists. (Photo by Andrew CABALLERO-REYNOLDS / AFP) (Photo credit should read ANDREW CABALLERO-REYNOLDS/AFP/Getty Images) ANDREW CABALLERO-REYNOLDS AFP/Getty Protests across US after abortion laws enforced Georgia ATLANTA, GA - MAY 21: Heather Masson, left, and Victoria Jernigan hold signs promoting a woman's right to choose during a protest against recently passed abortion ban bills at the Georgia State Capitol building, on May 21, 2019 in Atlanta, Georgia. The bill would ban abortion when a fetal heartbeat is detected. The Alabama abortion law, signed by Gov. Kay Ivey last week, includes no exceptions for cases of rape and incest, outlawing all abortions except when necessary to prevent serious health problems for the woman. Though women are exempt from criminal and civil liability, the new law punishes doctors for performing an abortion, making the procedure a Class A felony punishable by up to 99 years in prison (Photo by Elijah Nouvelage/Getty Images) Elijah Nouvelage Getty Protests across US after abortion laws enforced Alabama Cristina Castor (L) and Julian Kersh pose for a portrait in Ingram Park in Birmingham, Alabama, May 19, 2019 during the March for Reproductive Freedom. - "If this goes all the way and flips Roe v Wade at that point it just seems like where is this going to stop," Kersh said. The state of Alabama passed a near-total abortion ban on May 14, 2019 making it the most restrictive law in the United States. (Photo by Seth HERALD / AFP) (Photo credit should read SETH HERALD/AFP/Getty Images) SETH HERALD AFP/Getty

Senator McConnell accused his rival of trying to "gaslight the entire country" by clarifying that he said Republicans would pay a "political price" for establishing a conservative majority on the court - an effort also backed by Mr McConnell, who has boasted about stacking judicial appointments in other courts with conservative judges, which could hand Republicans legal victories in challenges to anti-abortion legislation.

Mr Schumer said his comments were a warning that the justices "will unleash a major grassroots movement on the issue of reproductive rights" against the Supreme Court's ruling.

In an unprecedented breach of the Supreme Court's impartial view from the bench, Justice John Roberts said the Senate Minority Leader's remarks outside on Wednesday were "dangerous" and Donald Trump said "serious action" must be taken.

"Justices know that criticism comes with the territory, but threatening statements of this sort from the highest levels of government are not only inappropriate, they are dangerous," he said in a statement. "All members of the court will continue to do their job, without fear or favour, from whatever quarter."

Missouri Republican Senator Josh Hawley also plans to introduce a resolution to condemn Senator Schumer's comments

Following Mr McConnell's rebuke, Mr Schumer accused Republicans of "manufacturing outrage" while they avoid the context of his remarks and concerns about constitutional protections for abortion.

He said: "I'm from Brooklyn. We use strong language. I shouldn't have used the words I did but I in no way was making a threat. I never, ever would do such a thing. Leader McConnell knows that. And Republicans who are busy manufacturing outrage outrage over these comments know that too."

Mr McConnell famously refused to hold confirmation hearings for then-President Barack Obama's nominee to the Supreme Court, Merrick Garland, igniting a partisan firestorm. He later added said his ability to prevent his appointment was among his proudest moments.