Joe Biden broke down in tears as he took the stage at the Democratic National Convention and called on the Party to embrace Vice President Kamala Harris as its leader as the fight for the White House heats up. Top Democrats from across the country gathered for their national convention in Chicago on Monday as they came together to sign Harris as their party’s best hope to defeat the Republican presidential candidate Donald Trump. President Biden’s appearance at the start of the four-day event comes after he was pressured to quit the race by party leaders worried the 81-year-old incumbent was t…