A new book about Joe Biden portrays the president as someone whose middle-class upbringing helped foster a resentment of intellectual elitism that shaped his political career and sometimes caused strain with his onetime boss, Harvard-educated Barack Obama.

       Biden, who spent eight years as Obama’s vice president, told a friend that Obama couldn’t even curse properly, according to “The Last Politician: Inside Joe Biden’s White House and the Struggle for America’s Future.”

       Released Tuesday and written by Franklin Foer, a staff writer for The Atlantic, the book says Biden said Obama was unable to deliver a “f—- you” with “the right elongation of vowels and the necessary hardness of consonants; it was how they must curse in the ivory tower.”