Sen. John Kennedy John Neely KennedyMORE (R-La.) on Sunday cautioned President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE against tweeting about criminal cases such as the one involving the president's longtime associate Roger Stone Roger Jason StoneOur Constitution is under attack by Attorney General William Barr Justice IG investigating Stone sentencing: report Romney says Trump's protest tweets 'clearly intended to further inflame racial tensions' MORE.

The Louisiana Republican told CBS’s “Face The Nation” that the president has a right to tweet about the case but that he hopes Trump will “accept” the advice from Attorney General William Barr Bill BarrBarr says Ginsburg 'leaves a towering legacy' Republicans call for DOJ to prosecute Netflix executives for releasing 'Cuties' Trump doesn't offer vote of confidence for FBI director MORE and refrain from doing so.

"Just because you can sing, though, doesn’t mean you should sing," Kennedy said.

"This is a case where tweeting less would not cause brain damage," he added.

.@SenJohnKennedy on @realDonaldTrump’s tweet about Roger Stone this week: "Just because you CAN sing, though, doesn’t mean you SHOULD sing.” Adds, "This is a case where tweeting less would not cause brain damage" pic.twitter.com/GaiWhQOE5x — Face The Nation (@FaceTheNation) February 16, 2020

Kennedy said Trump put Barr in an “awkward spot” when he tweeted about Stone’s case, adding the attorney general is “tough as a boot.”

“While the attorney general and others were trying to get the sentencing recommendations straight, the president tweeted, put the attorney general in an awkward spot, and he spoke out,” he said.

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Justice Department prosecutors recommended a seven- to nine-year sentence for Stone, who was convicted of lying to Congress and witness tampering. But after Trump tweeted that the recommendation was unfair, the department announced that it wanted a shoter sentence, prompting the entire prosecution team to withdraw from the case.

Democrats have accused Barr of working on the president’s behalf to protect one of his associates.