Dwight Eisenhower actually said...

I believe that under the circumstances existing at the time that war began, the war was necessary.

You cannot stand aside and see America's interest deteriorate throughout the world just by inaction.

However, as you people well know, I don't think that any of you ought to interpret anything I say in terms of a threat of any kind.

I signed this with really the prayerful hope that we may be able, with that amount, to sustain the essential interests of the United States ...