president trump will no doubt be watching system of the impeachment hearing, but he's counterprogramming in a very different way. president erdogan is visiting the white house today. let's go to cnn's jomana karadsheh. >> reporter: their relationship has been strained in the past few years, especially the last few months. topping the agenda for the united states, for the trump administration today is obviously going to be something that has been quite the controversy in the united states, and that is turkey's military offensive in northeastern syria, something that has united politicians and lawmakers from both sides in