Landon Lecture
... that Barack Obama is the first U.S. President since Lyndon B. Johnson who has not given a Landon Lecture?
... that <a href="./Barack_Obama" id="mwCBc" rel="mw:WikiLink" title="Barack Obama">Barack Obama</a> is the first U.S. President since <a href="./Lyndon_B._Johnson" id="mwCBg" rel="mw:WikiLink" title="Lyndon B. Johnson">Lyndon B. Johnson</a> who has not given a <b id="mwCBk"><a href="./Landon_Lecture_Series" id="mwCBo" rel="mw:WikiLink" title="Landon Lecture Series">Landon Lecture</a></b>?