"At the age of forty-four, Rubio has lively dark eyes, soft cheeks, and downy brown hair affixed in a perfect part."

"He sometimes asks crowds to see him in the tradition of a 'young President who said, "Ask not what your country can do for you; ask what you can do for your country."' (J.F.K. was forty-three when he entered the White House.) Senator Ted Cruz, of Texas, is only five months older than Rubio, but nobody calls him boyish. If the Democrats nominate Hillary Clinton or Bernie Sanders, the Party will be offering the oldest candidate that it has ever run in a general election, and Rubio has taken to saying, 'Never in the modern history of this country has the political class in both parties been more out of touch with our country than it is right now.' But in policy terms Rubio can appear older than his years. His opposition to same-sex marriage, to raising the minimum wage, and to restoring diplomatic relations with Cuba puts him out of step with most American Latinos. In the Spanish-language media, he is sometimes described as un joven viejo—a young fogey."

From a new, long article in The New Yorker by Evan Osnos titled "The Opportunist/Marco Rubio’s political dexterity."