Sen. Lindsey Graham Lindsey Olin GrahamSenate Republicans face tough decision on replacing Ginsburg Democratic senator calls for eliminating filibuster, expanding Supreme Court if GOP fills vacancy What Senate Republicans have said about election-year Supreme Court vacancies MORE (R-S.C.) told reporters on Thursday that presumptive GOP presidential nominee Donald 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 called him to discuss national security, according to multiple reports.

Graham told reporters a "mutual friend" arranged the call, which took place Wednesday.

Lindsey Graham tells reporters he had a call with Trump yesterday. He says Trump wanted to pick his brain on national security — Rosie Gray (@RosieGray) May 12, 2016

Graham said that he appreciated Trump reaching out and speaking with him about ISIS, but he's staying with position not to support Trump — James Arkin (@JamesArkin) May 12, 2016

In a statement on Thursday afternoon, Graham noted that Trump "is reaching out to many people, throughout the party and the country, to solicit their advice and opinions," which he called "a wise move on his part."

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The conversation, which lasted about 15 minutes according to the statement, "centered on the national security threats facing the United States."

“I gave him my assessment about where we stand in the fight against [the Islamic State in Iraq and Syria] and the long-term danger posed by the Iranian nuclear deal. He asked good questions," Graham said.

The South Carolina senator said he will continue to remain neutral ahead of the general election, as he doesn't support Trump or Democratic front-runner Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE.

“Finally, my position remains the same regarding both candidates running for President. I will do what I can in the Senate to help the next president. The next president will inherit a mess.”

Graham has been a critic of Trump throughout the campaign, saying last week he can't support the businessman because he isn't a "reliable Republican conservative, nor has he displayed the judgement and temperament to serve as commander in chief."

Trump hit back, saying he "destroyed" Graham's "hapless run for President."

The two also sparred repeatedly during Graham's own presidential bid, which ended last year.

This post was updated at 3:35 p.m.