WASHINGTON DC - Two of the U.S. president's most trusted advisors, had a huge row in the White House Oval Office on Thursday, with speculation later that one of them could resign.
White House Chief of Staff John Kelly went toe-to-toe with National Security Advisor, and known firebrand John Bolton, according to sources.
The row apparently was over the performance of Kirstjen Nielsen in her role of Homeland Security Secretary.
Nielsen had been brought in on Kelly's advice and sources saying he was defending her against remarks by Bolton, who was questioning her performance.
Sources say President Donald Trump was in attendance at the meeting, and was seemed to be supporting Bolton. Sources described the incident as "a heated exchange," and "a shouting match."
Aides overhearing the clash were said to be startled at the ferocity of the exchange.
There was some speculation Kelly would resign, however sources say that if this should occur it would probably not be until the end of the year.
'While we are passionate about solving the issue of illegal immigration, we are not angry at one another. However, we are furious at the failure of congressional Democrats to help us address this growing crisis," White House spokeswoman Sarah Sanders said in a statement released Thursday.
Earlier on Thursday Mr. Trump had threatened to deploy the U.S. military and close the southern U.S. border, as Hondurans and Salvadorans joined thousands of migrants in Guatemala seeking to enter the U.S..
'I must, in the strongest of terms, ask Mexico to stop this onslaught, and if unable to do so I will call up the U.S. Military and CLOSE OUR SOUTHERN BORDER!' Mr. Trump tweeted on Thursday.