Republicans who previously have sounded off about U.S. aid to Ukraine sounded cautiously optimistic about the new plan to offer U.S. weapons to the war effort through a purchase by other NATO countries.

President Donald Trump on Tuesday said he believed Republicans could pick up five seats in the U.S. House of Representatives by redrawing districts in Texas, which could boost his party's odds of defending its thin majority in next year's midterm elections.

Ukrainian Prime Minister Denys Shmyhal said on Tuesday he had submitted a resignation letter, as part of the country's largest wartime governmental reshuffle expected this week.