Politico reported on Friday that Breitbart’s continuing criticisms of national security adviser Lt. Gen. H.R. McMaster has had a negative impact on White House chief strategist Steve Bannon.

Breitbart, the conservative media outlet formerly run by White House chief strategist Steve Bannon, has and continues to publish critical pieces about national security adviser Lt. Gen. H.R. McMaster. 

Politico reported on Friday that the matter has had a negative impact on Bannon, as a number of people in the White House see him as the person coordinating those condemnations.
It writes, “The attacks on McMaster have put Bannon in an especially awkward position with his new boss, retired Marine general John Kelly, who has been increasingly defensive of McMaster, a longtime friend and fellow general, according to interviews with 10 administration officials and people close to the White House.” 
Politico further notes that Bannon has become more "isolated" since the departure of his ally, former chief of staff Reince Priebus. 
The report comes days after a Wall Street Journal editorial board op-ed pointed out, “the alt-right brigades who seem to rise up as if on call to smite some White House policy opponent of aide Steve Bannon.” 
It continues, “The latest target has been H.R. McMaster…[who] has come in for abuse for favoring more troops and a new strategy in Afghanistan, for warning that Vladimir Putin is no friend of America, and for advising that Mr. Trump not precipitously withdraw from the Iran nuclear deal.” 
McMaster has also spoken quite favorably about Kelly, whom he believes will be able to improve "cohesion" among White House high-level staffers. 
In an interview with MSNBC’s Hugh Hewitt that was broadcast on Saturday, McMaster said, “In terms of experience level, you know, demeanor, leadership ability, it's gonna be great for all of us, I think, in terms of improving our ability to operate together as a team."