New Jersey Gov. Chris Christie (R) says that President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE’s tweeting sometimes “hasn’t been for his best interest.”

“I’ve said many times both publicly and to the president directly — and I am not in a small group of people who have said this to him — that I think that Twitter is a great tool when used in the right way,” Christie said Tuesday, according to CNN.

“And I think many times he’s used it the right way to get his message out there and have people hear directly from him what he thinks, and other times I think what he’s done hasn’t been in his best interest,” Christie added.

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“And all I care about is what’s in the best interest of the president because that’s what’s in the best interest of the country. So I’m not going to get into critiquing every tweet.”

Christie also dismissed Trump’s recent tweets criticizing London Mayor Sadiq Khan's handling of a terror attack in his city.

“I think that people in public life are going to have conflicts with each other,” he said. “I’ve certainly had mine.”

“Again, the president said what he believed,” the 2016 GOP presidential candidate added. “And the London mayor has reacted the way he believed.”

London was hit by a terror attack on Saturday that killed seven and injured dozens more.

Khan on Sunday said Londoners had “no reason to be alarmed” by a larger police presence on the streets.

But Trump blasted Khan for the "no reason to be alarmed" remark in a tweet that took it out of context. He doubled down on Monday.

“Pathetic excuse by London Mayor Sadiq Khan who had to think fast on his ‘no reason to be alarmed’ statement,” Trump tweeted. “[Mainstream media] is working hard to sell it!”

Khan on Tuesday said he “really couldn’t be bothered” by Trump’s tweets.