The Democrats dominant foreign policy strain is neoconservativism. From Glenn Greenwald at theintercept.com:
ONE OF THE most under-discussed yet consequential changes in the American political landscape is the reunion between the Democratic Party and the country’s most extreme and discredited neocons. While the rise of Donald Trump, whom neocons loathe, has accelerated this realignment, it began long before the ascension of Trump and is driven by far more common beliefs than contempt for the current president.
A newly formed and, by all appearances, well-funded national security advocacy group, devoted to more hawkish U.S. policies toward Russia and other adversaries, provides the most vivid evidence yet of this alliance. Calling itself the Alliance for Securing Democracy, the group describes itself as “a bipartisan, transatlantic initiative” that “will develop comprehensive strategies to defend against, deter, and raise the costs on Russian and other state actors’ efforts to undermine democracy and democratic institutions,” and also “will work to publicly document and expose Vladimir Putin’s ongoing efforts to subvert democracy in the United States and Europe.”
It is, in fact, the ultimate union of mainstream Democratic foreign policy officials and the world’s most militant, and militaristic, neocons. The group is led by two longtime Washington foreign policy hands, one from the establishment Democratic wing and the other a key figure among leading GOP neocons.
The Democrat, Laura Rosenberger, served as a foreign policy adviser for Hillary Clinton’s 2016 presidential campaign and chief of staff to two Obama national security officials. The Republican is Jamie Fly, who spent the last four years as counselor for foreign and national security affairs to one of the Senate’s most hawkish members, Marco Rubio; prior to that, he served in various capacities in the Bush Pentagon and National Security Council.