Biden warns against ‘semi-isolationism’ and stresses importance of alliances at WWI cemetery in France

​ President Joe Biden warned against a streak of “semi-isolationism” in the US as he stressed the importance of alliances during a symbolic visit to the Aisne-Marne American Cemetery on Sunday, honoring the thousands of Americans who died in World War I at a site former President Donald Trump skipped during a 2018 visit to Paris. Read More Breaking News, Latest News and Videos | CNN