<a href="https://en.wikipedia.org/wiki/Vietnam_War" id="mw2g" rel="mw:WikiLink" title="Vietnam War">Vietnam War</a>: After a trip to <a href="https://en.wikipedia.org/wiki/Vietnam" id="mw2w" rel="mw:WikiLink" title="Vietnam">Vietnam</a> at the request of U.S. President <a href="https://en.wikipedia.org/wiki/John_F._Kennedy" id="mw3A" rel="mw:WikiLink" title="John F. Kennedy">John F. Kennedy</a>, <a class="mw-redirect" href="https://en.wikipedia.org/wiki/U.S._Senate_Majority_Leader" id="mw3Q" rel="mw:WikiLink" title="U.S. Senate Majority Leader">U.S. Senate Majority Leader</a> <a href="https://en.wikipedia.org/wiki/Mike_Mansfield" id="mw3g" rel="mw:WikiLink" title="Mike Mansfield">Mike Mansfield</a> becomes the first American official to comment adversely on the war's progress.