January 12, 1966. LBJ delivers his State of the Union: 

“Our Nation tonight is engaged in a brutal and bitter conflict in Vietnam. Later on I want to discuss that struggle in some detail with you. It just must be the center of our concerns.

But we will not permit those who fire upon us in Vietnam to win a victory over the desires and the intentions of all the American people. This Nation is mighty enough, its society is healthy enough, its people are strong enough, to pursue our goals in the rest of the world while still building a Great Society here at home.

And that is what I have come here to ask of you tonight.”

Full text here.