An endorsement from the hawkish Graham could help Bush in a state with a large military presence.
Bush and Graham have had a good relationship throughout the campaign and have frequently discussed policy behind the scenes. Friday in the 2016 Republican presidential primary.
Bush and Graham will hold a press conference to formally announce the endorsement at 9:45am ET in North Charleston, SC.
Lindsey Graham at the GOP debate in Las Vegas.
Graham ended his White House bid December 21.
"Donald Trump will damage the ability to grow this party".
Graham said Trump's proposed ban on Muslims entering the United States would complicate efforts to gain support from governments in the Middle East. At the debate, Bush had said Trump's idea was flawed and that a Muslim alliance was vital. "I am honored to have his support".
Welcoming the support in a key GOP primary state, Bush called Graham a "patriot" who is committed to rebuilding the US military for the battle against radical Islam.
"Ladies and gentleman, SC is gonna reset this race", Graham continued.
While the war in Afghanistan was widely viewed as retaliation for the September 11th attacks, the 2003 U.S.-led war in Iraq received widespread condemnation as it aimed to destroy weapons of mass destruction that were never found. At 8.5 percent in the RealClearPolitics rolling average of Palmetto State surveys, Bush is running a bit stronger there than he is in the U.S. as a whole. He dropped out of the race last month, and he and Bush have spoken fondly of each other in the weeks since.
"In Iowa, it's a question of organization".
Appearing in an extended interview on MSNBC's "Morning Joe" from Des Moines, Iowa, Trump said Cruz "hurt himself" in Thursday's debate with his sweeping remarks about the political ideologies of New Yorkers.
Still, Graham can be a polarizing figure in SC politics.
Pointing to his own experience, he said at age 44: "I was not ready to be president". "It's just the nature of the beast, and there's no reason to rewrite history".
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