James Clapper declined to specifically address the hacks of Democratic groups.
The president pledged to tighten sanctions against the nation.
OPINION | The global balance of power appears to be reaching a decisive point.
OPINION | Italy checks every box for the making of a full-blown economic crisis.
The loopholes were reportedly created to ensure Iran got sanctions relief.
Dilma Rousseff continues to deny any wrongdoing.
Obama has been asked to intervene in the case.
OPINION | He'd sacrifice Israel's security requirements in order to defeat a non-state ISIS.
OPINION | The Iranian foreign minister's Latin American trip is cause for concern.
North Korea just successfully tested its first submarine-launched missile.
OPINION | Across the developing world, it works, but the House cut USAID funding.
Defense officials called the incident "unsafe and unprofessional."
The bill "is far more likely to harm the United States than bring justice," they said.
"How they rebuild is going to be important,” he said.
Putin denies his involvement, saying, "on a state level Russia has never done this."
The comments come days after Apple was hit with a $14.5 billion tax bill.
OPINION | As the summit gets underway in China, all eyes will still be on Trump.
Abu Mohammad al-Adnani was the second-highest ranking member of ISIS.
OPINION | Many see President Rousseff's impeachment as a coup against her and democracy.
OPINION | Next president must help keep ex-Soviet republic in the West.
Trump has repeatedly hammered the Obama administration over its plan.
OPINION | It might happen before the next president takes office.
The Colombian government has reached a deal with FARC rebels.
The soldier was killed by an IED blast on Tuesday.