Lynne Sandford said she would not abandon her son Michael.
Celebrities were out in force on Monday to lend their support at the Democratic National Convention in Philadelphia.
America's first lady has joined Bernie Sanders to make an impassioned plea for Democrats to get behind Hillary Clinton's bid to be the nation's next president.
The FBI said it is investigating how thousands of Democratic National Committee emails were hacked, a breach that Hillary Clinton's campaign maintains was committed by Russia to benefit Donald Trump.
Hillary Clinton introduced running mate Tim Kaine as "a progressive who likes to get things done", joining him in the crucial battleground state of Florida to help kick off next week's Democratic National Convention.
Maybe this was why Cruz wouldn't endorse Trump last night....
Donald Trump is set to make his case to America - and to the many rattled doubters within his own party.
Ted Cruz was booed by furious delegates for refusing to endorse Donald Trump, undermining calls for Republican unity.
The writer who helped with Donald Trump's wife's speech at the Republican Party's National Convention says she made a mistake - and has offered to resign.
The Republican Party has formally nominated Donald Trump for president, completing the billionaire's rise from political outsider to major party candidate for the White House.
Donald Trump’s wife has been accused of plagiarising a 2008 speech made by Michelle Obama when she spoke to the US Republican National Convention last night.
Republicans have opened their convention to nominate Donald Trump for US president as dissident delegates pursued one last chance to deny the front-runner.
Hillary Clinton has condemned the killing of three Louisiana police officers, and declared: "This madness has to stop."
The Republican National Convention is taking place this week in Cleveland, Ohio.
Dissident delegates making a last-ditch attempt to prevent Donald Trump's US presidential candidacy at the Republican National Convention say they will try forcing a state-by-state vote on the rules governing the gathering.
Bernie Sanders has endorsed Hillary Clinton as the Democratic nominee in the race for the White House.
Donald Trump has railed against some Republicans planning a last-ditch effort to thwart him from becoming the party's presidential nominee, threatening at one point to stop fundraising if the party does not rally around him.
Hillary Clinton has brought a close to the presidential primary season with a win in the nation's capital and a meeting with beaten rival Bernie Sanders.
With calls growing for him to quit, Bernie Sanders went to the White House for a meeting that President Barack Obama hoped to use to try to nudge the Vermont senator to accept defeat in the Democratic race.
Bernie Sanders says he will continue to fight for the Democratic nomination.