"If Senator Rubio does not want to do his job of representing Florida in the Senate, then he should quit," Grayson said in a statement Wednesday. "After missing more votes than any other senator this year, Rubio is MIA, in dereliction of duty."

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Grayson noted that the Republican had a poor voting record even before he announced his Senate bid, adding that "Sen. Feinstein, who is 82 years old, missed fewer votes than Rubio. Sen. Kirk, who suffered a devastating stoke, missed fewer votes than Rubio."

"Marco Rubio has already quit on the people of Florida. His resignation simply makes that official. And when he does, I will say good riddance," he said.

Rubio has received significant criticism over the past few months from both Democrats and some of his Republican presidential rivals for missing votes.

He explained his attendance record Sunday on CNN by saying that many of the Senate votes aren't "meaningful" because they are essentially guaranteed to be vetoed by the president.

“I’m not missing votes because I’m on vacation,” he said. “I’m running for president so that the votes they take in the Senate are actually meaningful again.”

On Wednesday, the editorial at the Sun Sentinel, a South Florida newspaper, also called for Rubio to resign over his attendance record.

Grayson is running in the 2016 Senate race for the seat that Rubio is vacating. He faces fellow Rep. Patrick Murphy (Fla.) in the Democratic primary, with the winner facing off against whoever survives the crowded Republican primary.