Experts worry about a well-timed, sophisticated attack by a nation state that could help a candidate.
President 2016
Clinton claims victory in tight race in Kentucky; Sanders wins Oregon primary
The Democratic presidential candidates stand to split the two states’ delegates almost evenly.
Maine among states where Trump is expanding campaign staffing
The presumptive Republican presidential nominee is trying to push into places that historically have backed Democrats.
Disruption in Nevada raises concerns about Democratic unity
Clinton holds a commanding lead in pledged delegates but faces challenges in converting Bernie Sanders supporters to her side.
Hillary Clinton begins to pitch a 2-for-1 presidency
She says Bill Clinton will take the lead on the economy if she wins the White House.
Hillary Clinton responds to heckler
She answers a vocal critic during a rally in Hopkinsville, Kentucky.
Trump’s dismissal of data-based strategy worries Republicans
Critics question why he would pass on a chance to reinforce his presence on television and success with large-scale rallies.
Hillary Clinton tries to counter perceived weaknesses
Allies of the Democratic front-runner think Donald Trump is weaker. But some believe he could win.
Clinton makes big final push in Kentucky
Hillary Clinton leads Bernie Sanders by nearly 300 pledged delegates going into primaries in Kentucky and Oregon on Tuesday.
Trump masqueraded as his own spokesman to promote himself decades ago
A recording captures the kind of phone call reporters used to receive when they sought information about Trump.