The 44th United States President, Barack Obama has endorsed Democratic presidential candidate Kamala Harris. Obama gave the endorsement while addressing the party faithful on Tuesday. He is expected to pay tribute to outgoing President Joe Biden, who served as vice president for eight years. He used his well-known rhetorical powers to deliver a thundering endorsement of the Democratic presidential nominee, Harris. Obama, who got his political start in Chicago, has kept a low profile since leaving office in January 2017. But he remained a broadly popular public figure and one of the most powerf…