According to the author of this telegraph, why did the United States wait to enter World War II? American leaders could not make up their minds about which side to fight on. American leaders wanted to let other countries grow weak and then claim supremacy. American leaders calculated that the financial cost of the war would be too great to pay. American leaders would have declared war earlier, but Congress would not vote for it.

American leaders calculated that the financial cost of the war would be too great to pay.

Explanation:

The United States didn't join the war late, the United States didn't want to join world war II at all and there was no reasonable ground to do so.

Once Japan bombarded Pearl Harbor and announced war on America supported by Hitler, some say foolishly, revealing war two days later, the country's attitude changed 180 degrees and Roosevelt got his war.

b. parliament was weaker than the monarchy.