Singer Katy Perry wore a “Persist” armband during her performance at the Grammys Sunday night, in an apparent nod to Sen. Elizabeth WarrenElizabeth Ann WarrenHere are the potential candidates still eyeing 2020 bids Sanders unveils education plan that would ban for-profit charter schools Warren policy ideas show signs of paying off MORE (D-Mass.).

The “Persist” band likely referenced Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellOn The Money: Treasury rejects Dem subpoena for Trump tax returns | Companies warn trade war about to hit consumers | Congress, White House to launch budget talks next week | Trump gets deal to lift steel tariffs on Mexico, Canada Schumer calls on McConnell to hold vote on Equality Act House Dem cites transgender grandson in voting for Equality Act MORE’s (R-Ky.) words silencing Warren on the Senate floor last week as she read Coretta Scott King’s letter against Attorney General Jeff SessionsJefferson (Jeff) Beauregard SessionsMSNBC host: Barr 'the most dangerous person' who works for Trump Chris Wallace: AG Barr 'clearly is protecting' Trump Appeals court rules Trump end of DACA was unlawful MORE's nomination to a federal judgeship in the 1980s.

“She was warned. She was given an explanation. Nevertheless, she persisted,” said McConnell, whose words quickly became a slogan for Warren supporters.

Perry performed her song “Chained to the Rhythm.” Throughout her performance, Perry walked through fences — which some social media users saw as a reference to Trump’s proposed wall along the U.S.-Mexico border. At the end, the first words of the U.S. Constitution were projected onto the fences behind Perry as she shouted, "No hate."

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Perry, who also wore a white pantsuit and a Planned Parenthood pin on her lapel, was a prominent supporter of Democratic presidential nominee Hillary ClintonHillary Diane Rodham ClintonWarren policy ideas show signs of paying off Biden at campaign kickoff event: I don't have to be 'angry' to win Top Dem: Trump helps GOP erase enthusiasm gap; Ohio a big problem MORE throughout her campaign and joined the Women’s March on Washington held at the start of the Trump administration.