Ukrainian President Volodymyr Zelenskyy said Wednesday that "against all odds" Ukraine still stands, as he paid a defiant wartime visit to Washington to thank U.S. leaders and "ordinary Americans" for their support in fighting off Russia's invasion. He pledged there would be "no compromises" in trying to bring an end to the war. President Joe Biden and Congress responded with billions in new assistance and a pledge to help Ukraine pursue a "just peace."