BERLIN – Europe faces "civilizational erasure" and must change course to remain a reliable ally for the United States, according to a U.S. National Security Strategy posted on the White House website.

President Donald Trump’s administration set forth a new national security strategy that paints European allies as weak and aims to reassert America’s dominance in the Western Hemisphere.

The National Security Strategy, released overnight, described Trump's vision as one of "flexible realism" and argued that the U.S. should revive the 19th century Monroe Doctrine, which declared the We...