What was president Roosevelt main purpose is giving his address to congress after the attack onPearl Harbor

to give a speech

Explanation: Roosevelt set about to prepare the nation to accept expansion of federal power. Roosevelt recognized that the programs he was about to introduce for congressional legislative action to relieve the dire effects of the Great Depression were unprecedented in peacetime.Sep 23, 2016

to emphasize the historic nature of the events that happened at the harbor. And telling the American people to never forget that day and to memorialize that day.

Explanation:

first paragraph (and busy all the night ,with a silence deep and white )