Due to constitutional restraint and the balance of power, "feared" is not usually an adjective that applies to a US president , at least not in regard to citizens and friends of the United States. Enemies of the United States have had reason to fear the military might of the US and by projection, its President. During war time, Franklin Roosevelt was no doubt feared at times by the Germans and Harry Truman by the Japanese. Abraham Lincoln gave the Confederacy cause for fear.
Just the thought of Ronald Reagan's Strategic Defense Initiative reportedly frightened the Russians into an expensive arms race which helped to break up the Soviet Union.
The U.S. feared communism was spreading to Latin America.
Brezhnec feared that a US alliance with China would isolate the Soviet Union.
President Roosevelt feared that the war between Japan and Russia would close the door to US trade with China. In China, the US competed with other nations for access to Chinese consumers.
Many Southerns feared they would have little say in the government.
He feared a communist takeover in Southeast Asia if the United States left Vietnam.
mambas and camo spiders are some of the most feared.
President Truman feared the spread of Communism to Southeast Asia.
Most feared a... wolves most dangerous honey badger
The Roman senate and the patricians (the aristocracy) feared Caesar the most.
The most effective us president is Abhraham Linkhan
Brezhnec feared that a US alliance with China would isolate the Soviet Union.
He feared the effect on materials needed for the Korean war.