Donald Trumps political persona is based around putting the United States first.
Trumps campaign has denied Woodwards reporting.
McMaster, believe the Russian president is exploiting Trump.
Donald Trump and Russian President Vladimir Putin hold a meeting on the sidelines of the G20 Summit in Hamburg, Germany, on July 7, 2017.Saul Loeb/AFP/Getty Images
McMasterwrote in a recently released bookthat Putin played to Trumps ego and insecurities with flattery.
[Putin] knew really what Trumps predilections were, McMastertold CBS Newsin August.
