Trump said national security adviser dismissed

US President Donald Trump was removing National Security Advisor Raymond McMaster, who had been receiving news for quite some time. Finally the buzz was really. Trump told to remove McMaster from a tweet yesterday night.
In addition to the tweet message, the appointment of former US ambassador John Bolton to the United Nations as a new national security adviser in place of Macmaster was also announced. The US president said in Twitter that it will be effective from 9 April.

In the past two weeks, the US President dismissed another US official through Twitter messages. Earlier, on March 13, a Twitter message dismissed US Secretary of State Rex Tyleron and appointed CIA Director Mike Pompeaux as Foreign Minister Trump.
After the resignation of former security adviser Michael Flin, Macmasters was appointed on February 20, 2017. Recently, the US media published reports that CNN McMaster was dismissed. Although the matter was denied by the White House. Finally, the CNN report is true.
Macmaster has been lost in office to oppose the decision to leave the United States from Iran's nuclear deal. Because, for the same reason, Rex Tylor has lost the post of foreign minister.