Will Roberto Brien News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Environmental regulations. we'll dig into that in just a moment we start with breaking news. president trump just named a new national security adviser, his fourth in 2 1/2 years. that's the most any president has had in his first term. let's go right to the white house. that's where we find nbc's kelly o'donnell. kelly o., what do we know about robert o'brien. >> reporter: robert o'brien has been part of a few of the moments of the trump administration that the president has been most likely to boast about, and that is the return of americans held overseas as hostages or captives he has bee...

Has gotten to know o'brien, and he has also had an opportunity to get to work with mike pompeo. both of those things are key because advisers here want a sort of no-drama approach after the position involving national security adviser has certainly been drama-filled throughout the trump years. of course, timing is important the president will go to the u.n. general assembly later this month, and that is high stakes to be sure it comes at a time when there's increased tension with iran and, of course, with the attacks on the saudi arabian oil fields when you look at who is robert o'brien, in pa...

Security advisor does not require senate confirmation, so the president appointing him puts him in this position. he's a california native he's authored books. he has been a part of the sort of private sector as well as government, national security back and forth worked with condoleezza rice during the administration of george w. bush and so forth. so not a well-known name in terms of the general public, but in those republican circles has been known over the last couple decades, and certainly may be more prominent going forward in the administration the other big expectation is he will be in...