Cardi B on Thursday slammed a GOP lawmaker after he criticizing her Grammy performance.

The rapper called Rep. Glenn Grotman (R-Wis.) an "idiot" after the lawmaker took to the House floor on Thursday to describe complaints he said his office received about Cardi B's awards show performance of her hit song, "WAP," last month.

He added that millions of Americans would consider her spot during the Grammys as "inconsistent with basic decency." 

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"Wake up, [Federal Communications Commission] FCC and begin to do your job. The moral decline of America is partly due to your utter complacency," Grothman said.

The 28-year-old entertainer, a vocal critic of former President TrumpDonald TrumpRonny Jackson, former White House doctor, predicts Biden will resign McCarthy: Pelosi appointing members of Jan. 6 panel who share 'pre-conceived narrative' Kinzinger denounces 'lies and conspiracy theories' while accepting spot on Jan. 6 panel MORE, expressed her anger, stating that representatives have decided to talk about her performance instead of police brutality. 

"This gets me so mad," the "Up" rapper tweeted to her nearly 18 million followers on Thursday, along with a video of Grothman's speech.  

"I think we all been on the edge this week since we seen police brutality back to back including watching one of the biggest case in history go down DUE to police brutality but wait," she wrote.

"This is wat state representative decide to talk about," Cardi B said.

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The tweets from the performer come after a jury this week found former Minneapolis police officer Derek Chauvin guilty of all three charges brought against him in the murder of George Floyd. 

Floyd's death sparked nationwide protests last year after footage posted to social media went viral showing Chauvin kneeling on the man's neck for several minutes until he became unresponsive. 

The same day of Chauvin's verdict, police in Columbus, Ohio, shot and killed Ma'Khia Bryant, a Black teen who was recorded holding a knife while charging at another girl. 

"This is why people gotta vote ,elect better people," the performer wrote.