The Justice Department has embarked on a fresh investigation into one of President Donald Trump’s chief grievances, issuing a flurry of subpoenas related to the U.S. government’s inquiry into Russian interference in the 2016 presidential election.

The grand jury probe marks a significant escalation of Trump's retaliation against Obama aides who led a probe of his 2016 campaign's ties to Russia.

EXCLUSIVE: What did Trump whisper to Orbán that made the Hungarian leader fidget with his tie? A lip reader deciphers the intriguing off-mic exchange.

Hungarian Prime Minister Viktor Orbán is traveling to the United States on Friday to meet with U.S. President Donald Trump at the White House.

U.S. President Donald Trump said on Wednesday that he may be working on a plan to denuclearize with China and Russia, without providing details.

President Trump has boldly reasserted his wild claim about America’s capacity to create a global nuclear catastrophe. The 79-year-old was speaking to reporters at the White House on Wednesday when he mentioned the results of his “tremendous” meeting with Chinese President Xi Jinping last week.