Strategic Horizons Does McMaster Pick Mean Trump Will ‘Go Big or Stay Home’ in Using Military Force? Steven Metz Friday, Feb. 24, 2017 Donald Trump’s new national security adviser, H.R. McMaster, has no known views on American grand strategy. He has, though, taken strong positions on the application of armed force. His writing and speeches may indicate how the Trump administration in general will think about the use of the U.S. military.