Article snippet: Pentagon officials are bracing themselves for increased friction between the Defense Department and the White House with John Bolton’s pending arrival as MORE’s national security adviser. Bolton, who Trump selected to replace H.R. McMaster earlier this month, enters a Cabinet already rocked by the February ousting of Secretary of State MORE. Mattis, who met Bolton for the first time this week, publicly stressed that he had “no reservations, no concerns at all,” in working with the hawkish former George W. Bush administration official. “Last time I checked he’s an American. I can work with an American, OK? I’m not in the least bit concerned with that sort of thing,” Mattis said prior to the meeting. And within the Pentagon, some were encouraged by the first exchange between Bolton and Mattis. When Mattis received Bolton on the steps of the Pentagon on Thursday, he joked that he heard Bolton was “the devil incarnate.” “Thank you for coming. It's good to finally meet you. I heard you’re actually the devil incarnate, and I wanted to meet you,” Mattis said, as captured by reporters' microphones. “I take that as a good sign that Mattis thinks he can work with him,” a source familiar with the situation at the Pentagon said. At the same time, this source said there is skepticism that Mattis and Bolton will make for a great team. “I don’t think they will get along,” the source said. “I think they’ll be at odds.” White House chief of staff MORE has sought to build a team... Link to the full article to read more