Donald Trump suggested Wednesday that as president he might take a different approach toward NATO than previous administrations, including possibly setting conditions for defending members under attack.

In an interview with The New York Times, Trump said that the U.S. has shouldered too much of the cost burden for the longstanding security alliance.

Trump told the newspaper he would force some of the 28 NATO members to contribute more and would make American defense contingent upon those nations having "fulfilled their obligations to us." 

Such conditions for the defense of a fellow NATO member would appear to violate the organization's charter, signed in 1949 and updated as recently as March. The agreement establishes that "an armed attack against one or more [members] in Europe or North America shall be considered an attack against them all." It goes on to say that parties to NATO shall immediately respond with "action as it deems necessary, including the use of armed force." 

Trump told the Times the position was part of his broader approach to put "America first."