Former President Barack Obama doesn’t believe Kamala Harris can beat Donald Trump in November. The two-term Democratic president has reportedly yet to endorse Vice President Harris because of her competition, RadarOnline.com can reveal. Soon after Joe Biden, 81, announced on Sunday, June 21, that he would be stepping aside, the president endorsed his running mate, 59-year-old Harris. While support from the president and other Democratic lawmakers poured in, Obama, 62, remained notably stayed silent. A source revealed that the 62-year-old former president was “very upset” and refrained from pub…