The Florida governor, who joined Donald Trump in declaring that defending Ukraine from Russia was not a vital interest, drew swift condemnations from establishment Republicans.Declaring this week that defending Ukraine against Russia’s invasion was not a vital interest for the United States, Gov. Ron DeSantis of Florida cemented a Republican shift away from hawkish foreign policy that has played out over the past decade and accelerated with Donald J. Trump’s political rise.Mr. Trump and Mr. DeSantis — whose combined support makes up more than 75 percent of Republican primary voters in the nascent 2024 presidential contest — are now largely...