Donald Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE lashed out at Democratic leader Harry Reid Harry Mason ReidOn The Trail: Battle over Ginsburg replacement threatens to break Senate Democrats fear Russia interference could spoil bid to retake Senate Graham signals support for confirming a Supreme Court nominee this year MORE after some harsh words from the Nevada senator.

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In an interview published Thursday, The Washington Post asked Trump about Reid’s assertion that Trump is “not slim and trim” after he released some medical information.

“Harry Reid? I think he should go back and start working out again with his rubber work-out pieces,” Trump said.

The comment was an apparent swipe at Reid’s exercise accident last year in which a resistance band snapped and caused Reid to fall, breaking ribs and facial bones and partially blinding him.

On the Senate floor Thursday, Reid said Trump is a “spoiled brat” who wants to "scam" the country.