An examination reveals the president was warned about the potential for a pandemic but that internal divisions, lack of planning and his faith in his own instincts led to a halting response.

Navigating between aiding Ukraine and avoiding an escalation with Moscow has led to a tangle of decisions and sometimes tortured distinctions over weapons and other elements of policy.

An editor at Arizona State University’s student newspaper beat everyone else to the news that Kurt Volker had stepped down.

In one of the most sophisticated and perhaps largest hacks in more than five years, email systems were breached at the Treasury and Commerce Departments. Other breaches are under investigation.

President Trump took a step even Richard M. Nixon avoided in his most desperate days: openly ordering direct, immediate government action against specific opponents, timed to serve his re-election...

President Trump’s intelligence briefings have gotten renewed attention since he blamed them for failing to sound the alarm early on about the coronavirus.

Ukrainian officials suggest Iran would not have admitted responsibility if investigators from Ukraine had not found missile debris in the crash wreckage.

An examination reveals the president was warned about the potential for a pandemic but that internal divisions, lack of planning and his faith in his own instincts led to a halting response.

He hungered to paddle across an ocean so vast it seemed infinite. He did it three times, setting records and becoming a national hero in Poland.

If the administration had reacted to the ventilator shortage in February, a private sector effort starting now might have made lifesaving equipment in mid- to late April. Now it is unlikely to be...

He could have taken action. He didn’t.

The president’s push to prevent states from certifying electors and get legislators to override voters’ choice eclipses even the bitter 1876 election as an audacious use of brute political force.

When the Russian leader ordered his nuclear forces into “special combat readiness,” the U.S. could have gone on high alert. Instead, the administration tried not to inflame him.

What the top-secret documents might mean for the future of the war in Ukraine.

The Pentagon, intelligence agencies, nuclear labs and Fortune 500 companies use software that was found to have been compromised by Russian hackers. The sweep of stolen data is still being assessed.

Don’t mistake Donald Trump’s withdrawal from the world for isolationism.  

High-level clearance is not required to see that the list of Russian aggressions in recent weeks rivals some of the worst days of the Cold War.

Intelligence officials suspect that the explosion involved a prototype of a nuclear-propelled cruise missile that President Vladimir V. Putin of Russia has boasted can reach any corner of the earth.

Those behind the widespread intrusion into government and corporate networks exploited seams in U.S. defenses and gave away nothing to American monitoring of their systems.

Police violence and President Trump’s threats to use the military against protesters have undercut American criticism of autocrats and called into question the country’s moral authority.