Is America turning its back on the world?

Late last year, Donald Trump tweeted that, the United Nations had become, "Just a club for people to get together, talk and have a good time." His budget proposal released today includes massive cuts to the State Department and in US contributions to UN programs, including peacekeeping and environmental protection. UN critics say it's about time.  But whatever the UN's shortcomings, supporters call reversing decades of US policy a threat to international order…and a risk to America's own national security.