Sen. Mazie Hirono Mazie Keiko HironoManchin defends Supreme Court candidate Barrett: 'It's awful to bring in religion' Democrats shoot down talk of expanding Supreme Court Democrats unveil plan declaring racism a public health issue MORE (D-Hawaii) on Monday called conservative Supreme Court Justices Neil Gorsuch, Samuel Alito and Clarence Thomas "the three horsemen of the apocalypse" waiting for a fourth justice to join their ranks.

Hirono's comments came hours after the high court decided to partially grant the Trump administration's request to lift a stay and implement his travel ban barring people from six predominantly Muslim countries from coming to the U.S. The court agreed to examine the entire executive order at a later date.

"Neil Gorsuch, who I did not support as a Supreme Court justice, he's joined two of the most conservative justices, Clarence Thomas and Alito on the court to take the position that the entire injunction should have been lifted," Hirono said on MSNBC's "Andrea Mitchell Reports."

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"This is like the three horsemen of the apocalypse, and they're waiting for the fourth one to come along so that they can go on their trend toward what I call our extremism," she added.

"I'm not surprised at all that Neil Gorsuch is right in there with Thomas and Alito in pretty much telling the president, ‘you go right ahead, impose a Muslim ban.' I'm glad the other justices are not there quite yet," Hirono added.

The Supreme Court will hear the case when it returns for the fall term in the beginning of October.

Recent reports have stirred speculation that Justice Anthony Kennedy may announce that he is retiring from the bench on the court's last day of this term, giving Trump the second chance to nominate a justice.