Lyndon Johnson actually said...

You personally are asking of the British people today the same fortitude--the same resolve--that turned the tide in those days.

You and I share a common purpose in several fields, the same is true, I think, of our peoples in our two countries.

In World War II, Mr. Prime Minister, England saved herself by fortitude and the world by example.

You and I know it most appropriately as the 'imbalance of payments.'