Republicans divided on Russia's security threat as Vance joins Trump presidential ticket

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There is an increasing sense of division in the Republican Party when it comes to the U.S. posture abroad, particularly when it comes to countering Russia, as Sen. JD Vance, R-Ohio, joins Donald Trump as his running mate in the race for the White House.

The calls to stop military aid to Ukraine reflect a fundamental break in the party and a reversal to the long-held GOP neoconservative approach to foreign policy, which previously leaned heavily on an interventionist strategy.

Ronald Reagan famously held a "peace through strength" approach, which relies on military power to preserve global stability, a policy that both the Bush administrations adhered to.

But the policies practiced by Republican Party leaders from the 1980s through the early 2000s have prompted a rise to a different approach in the GOP, a strategy not largely held since before World War II — isolationism.

TRUMP DEMANDS EUROPE COUGH UP MORE CASH FOR UKRAINE, SAYS WAR WITH RUSSIA WOULDN’T HAVE HAPPENED ON HIS WATCH

"I do think that is a repudiation," Victoria Coates, a former deputy national security adviser to Trump, told Fox News Digital, pointing to the decades-long wars in the Middle East. "A rejection of the traditional establishment neoconservative stance, which favors military intervention to promote democracy.

"I just don't think that that's been a winning formula," she said, noting many