The rise of Donald Trump is threatening the power of neoconservatives, who find themselves at risk of being marginalized in the Republican Party. Neoconservatism was at its height during the presidency of George W. Bush, helping to shape the rationale for the U.S. invasion of Iraq.
But now the ideology is under attack, with Trump systematically rejecting each of its core principles.
Whereas neoconservatism advocates spreading American ideals through the use of military force, Trump has made the case for nationalism and a smaller U.S. military footprint.
In what Trump calls an "America First" approach, he proposes rejecting alliances that don't work, trade deals that dont deliver, and military interventionism that costs too much.
He has said he would get along with Russian President Vladimir Putin and sit down with North Korean dictator Kim Jong Un a throwback to the realist foreign policy of President Nixon.
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