Democratic candidate suggests military could intervene if president refuses to leave office in event he loses election; White House dismisses 'ridiculous proposition'

33-year-old Jewish media executive is known for breaking fundraising records during a 2017 special election loss for a US House seat

Voting hours extended in many places after long lines caused by technical glitches, lack of poll workers, high turnout; calls for investigation into state's handling of the vote

Former VP pulls together delegates needed after 7 states and District of Columbia hold primaries; has effectively been party leader since Sanders dropped out of race in April

Tech company says it sent targeted users a 'government-backed attack warning,' found no evidence the phishing attempts were successful

COVID-19 infections had been abating, but Trump administration worries mass gatherings will lead to resurgence, harming economy and president's reelection chances

With no real competition, Biden and Trump easily won their respective primaries as voters waited in long lines hours after polls closed in some cases, brushing up against curfews

Leading Democrat candidate needs to win 89% of all delegates at stake to secure nomination, but his role as party's clear presidential nominee is not in danger should he fall short

Commenting on rioting following death of George Floyd, US president vows to deploy military to US cities, declares himself a leader of 'law and order'

Presumptive Democratic presidential nominee meets in person with black community leaders, holds virtual talk with mayors, as he seeks to elevate his voice during US racial crisis