U.S. President Joe Biden on Sunday abruptly abandoned his reelection bid in the face of growing doubts among his supporters over his age and whether he still has the mental sharpness to defeat his predecessor Donald Trump.Biden publicly endorsed Vice President Kamala Harris to be the Democratic Party's nominee. The 59-year-old would be the first woman to serve as U.S. president if she replaces Biden atop the party's ticket and wins in the November election against Trump, who formally accepted the Republican Party's nomination on Thursday."While it has been my intention to seek reelection, I…READ FULL ARTICLE