Following his announcement that he will not seek a second term, US President Joe Biden says Vice President Kamala Harris has his “full support” to replace him on the ballot in November’s election. “My fellow Democrats, I have decided not to accept the nomination and to focus all my energies on my duties as president for the remainder of my term,” he wrote in a post on his personal X account on Sunday. “My very first decision as the party nominee in 2020 was to pick Kamala Harris as my vice president. And it’s been the best decision I’ve made. Today I want to offer my full support and endorseme…