CAMBRIDGE, Mass. (CBSNewYork/AP)– The Harvard Republican Club won’t be endorsing Donald Trump, marking the first time in 128 years that the organization has not backed the Republican nominee for president.

The club told members and alumni Thursday that it won’t support Trump. It said in a statement that Trump is “a threat to the survival of the Republic” and lacks the temperament and character necessary to be president.

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The organization said Trump’s platform would endanger Americans’ security both at home and abroad, and his views are not consistent with conservative principles. It also said Trump’s mocking and belittling of various groups and people is both bad politics and “absurdly cruel.”

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The club urged Republican Party leaders to renounce their support of Trump.

A Trump spokeswoman didn’t immediately return a message seeking comment Thursday.

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