Obama warns that Trump's actions threaten US democracy

(CNN)In one of the most jolting moments in modern political history, former President Barack Obama reclaimed his political pulpit with a stark warning that his successor is a grave and imminent threat to American democracy and racial justice. Then, even more remarkably, President Donald Trump went on television and proved him right, putting a foreboding shadow over an election that he is already seeking to cast as illegitimate in the eyes of millions of Americans. The campaign between Trump and presumptive Democratic presidential nominee Joe Biden has mostly chugged along out of sight, obscured by a pandemic that has killed more than 150,000 Americans. But the extraordinary interventions...