Sen.(R-S.C.) is offering some frank advice for fellow Republican senators hoping to get help from the White House on repealing and replacing ObamaCare: Think again.

"Here's what I would tell any senator: If you're counting on the president to have your back, you need to watch it," Graham told reporters with a laugh on Monday evening.

"If you're looking for political cover from the White House, I'm not sure they're going to give it to you," he said.

Graham's comments came after he was asked about Trump calling the House-passed legislation "mean" during a closed-door meeting with senators earlier this month.

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The remarks appeared to catch lawmakers off guard, and marked a turn from when the president publicly praised the bill during a Rose Garden celebration last month.

The Senate is expected to vote on its bill to repeal and replace ObamaCare as soon as this week.

Republicans are facing a new hurdle in their effort to vote on the bill before the July 4 recess, after the Congressional Budget Office (CBO) analysis found that the Senate legislation would result in an additional 22 million individuals becoming uninsured by 2026.

The analysis also found that lower financial assistance in this bill compared with ObamaCare would make premiums unaffordable for many low-income people.

“If you were on the fence, if you were looking at this as a political vote, the CBO score didn’t help you,” said Graham, who nonetheless is leaning in favor of the bill himself.

Four GOP senators have said they will vote to effectively block the bill on a procedural hurdle unless changes are made. Several other swing votes signaled on Monday evening that they remain undecided.

Heller is from a state that expanded Medicaid under ObamaCare and is also the most vulnerable Senate Republican up for reelection in 2018.