The phrase "as an isolationist" is correct and usable in written English.
It can be used when describing someone who advocates for a policy of non-involvement in international affairs or conflicts.
Example: "The politician spoke passionately about his beliefs as an isolationist, arguing that the country should focus on domestic issues rather than foreign entanglements."
Alternatives: "in a non-interventionist manner" or "as a non-interventionist."
Maybe the Bush foreign-policy adventures had so discredited foreign interventionism that to attack Trump as an isolationist was futile.
America First has not just served as an isolationist term, but as an early slogan of the Ku Klux Klan with surprising links to the present.
Ron Paul ran for President as the nominee of the Libertarian Party in 1988 and as an isolationist Republican in the Presidential primaries of 2008 and 2012.
Donald Trump last night followed Ronald Reagan in 1982 and George Bush in 2001 as an isolationist turned interventionist in the Middle East.
To that end, he rightly says, the United States needs to act as a benign hegemon rather than as an isolationist or a despot.
The president ran as an isolationist and an America-firster; Bolton believes in military action to attack regimes that are even a potential threat to the United States.
But by 1943, H.W. Janson, a well-known art historian, was deriding the work as promoting an isolationist fiction of rural purity and self-sufficiency.
He also suggested that Mr Cameron, although "not as pro-European as me", was not an "isolationist nationalist" on Europe either.
Mr. Nasaw writes that since his death "Joseph P. Kennedy has been vilified and dismissed as an appeaser, an isolationist, an anti-Semite, a Nazi sympathizer, an unprincipled womanizer, a treacherous and vengeful scoundrel who made millions as a bootlegger and Wall Street swindler, then used those millions to steal elections for his son".
Ultimately, Trump, who bills himself as something of an isolationist, is likely to defer to Western Europe in the negotiations on resolving the Ukraine conflict, and has even called on Germany to take the lead on the issue.
That was the theme that France's prime minister, Lionel Jospin, picked up this spring: "This is not an isolationist administration as has been the case before in the Republican tradition," he noted.
