(THE HILL) Sen. Lindsey Graham (R-S.C.) on Friday said he would not vote for Donald Trump.
Graham is the highest GOP office holder so far to rule out voting for Trump.
Other Republicans, such as Sen. Ben Sasse (R-Neb.), have also said they won't support Trump in the fall, while Speaker Paul Ryan (R-Wis.) said Thursday he couldn't yet support the controversial businessman.
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