The shock jock, who has been accused of sexism, homophobia and racism throughout his career, is one of Mr Trump’s most relentless defenders and advocates in the media.
Limbaugh revealed to his listeners on Tuesday that he was recently diagnosed with advanced lung cancer.
In his speech, Mr Trump extolled the “Great American Comeback”, claiming credit for the nation’s economic success as Republican members of Congress applauded nearly every sentence of his speech, often leaping to their feet to cheer him.