Senator John McCain of Arizona took the platform of a late-night talk show Wednesday and said he would formally announce his campaign for the presidency in early April. His remarks erased entirely whatever doubt could have existed about his ambitions for the Republican nomination.
“The last time we were on this program — I’m sure you remember everything very clearly that we say — but you asked me if I would come back on this show if I was going to announce,” Mr. McCain told David Letterman. “I am announcing that I will be a candidate for president of the United States”, reports the Financial Times in an article from the New York Times.
 

 “Oh,” Mr. Letterman replied with what seemed at least a glimmer of surprise.
 

Mr. McCain is known as something of a free spirit, and his aides suggested that his remarks to Mr. Letterman were, if formal-sounding, extemporaneous rather than a result of careful planning by his campaign. Nonetheless, aides said, his appearance clearly fit into the campaign’s effort to stir as much excitement and interest as possible in his plans — a point Mr. McCain himself made as he and Mr. Letterman bantered on.