US National Security Adviser Robert O'Brien urges Russians to rethink stance 'before a costly arms race ensues'

In leaked call, Ben Sasse says he's never supported the president, whom he also claims mistreats women and uses the White House as a business

US president campaigns in Florida and Georgia, neighboring states he must win again to extend his presidency; his original plan had been to expand into Democratic-leaning states

Barbara Res, a former executive at the Trump Organization, urges Americans to deny the president a second term

Incident involving New York Post, Hunter Biden emails and FBI raises red flags for White House staffers, who fear former NYC mayor may hurt president's reelection chances

Social media giant says it will now only block stolen information posted by hackers after Republican fury over removal of contentious story on Hunter Biden

6-month trial finds drug used to treat Trump, listed as standard care in US, had 'little or no effect' on if patients die within a month or whether hospitalized patients recovered

Creation of new group is a sign that some Republican donors are worried by the approach taken by Trump's campaign

US president acknowledges debts, won't confirm he took COVID test before debate; Democratic candidate blasts pandemic response, says he'll address court-packing before vote

Trump: 'He had it for such a short period of time, I don’t even think he knew that he had it," pitches quick recovery as reason to reopen schools