is ukraine counting on president biden now making that trip as well, to signal the depth of the u.s. commitment to ukraine? well, nothing is scheduled yet on that front. of course, we do have u.s. senior officials who are interested in going into ukraine. not only the congressional delegation you mentioned, but also we did have secretaries blinken and austin go recently. i think we ll continue to have a stream of officials it looks like we ve got a technical issue. we ll try to continue that interview with the u.s. ambassador to ukraine. much more on that coming up. an important note to our viewers. on how you can help the humanitarian efforts in ukraine, to go cnn.com/impact and help impact your world. coming up, western official believe vladimir putin could move to formally declare war on