national security

The Supreme Court hears arguments on the ban Wednesday, and a bipartisan group of former national security officials from the Reagan to Obama administrations are urging the court to strike it down.

Even as President Trump is warming relationships with Muslim nations in the Middle East, he is antagonizing U.S. Muslims with his choice of a new national security adviser and secretary of state.

President Trump publicly chastised McMaster last month, after he said that "the evidence is now really incontrovertible" that Russia had interfered in the 2016 election.

Luis Elizondo used to run a Pentagon office that investigated unidentified flying objects seen by the U.S. military. He says his staff often could not explain what it saw.

The former national security adviser is becoming a central figure in the special counsel's probe of Russian election interference and any possible connections between Russia and the Trump campaign.

Emails have been a central theme for President Trump, who has repeatedly said that Democratic rival Hillary Clinton should face federal criminal charges over her use of private email.

The Washington Post reported that the president revealed "highly classified information" to the Russian foreign minister and ambassador, possibly jeopardizing future intelligence gathering on ISIS.

The Trump administration has already banned large electronics in cabins of flights from several Middle Eastern countries. The European Union wants talks over the proposal, which could cost airlines.

Ex-Obama officials say their former boss raised red flags about the man who became Trump's national security adviser in a November Oval Office meeting. Trump ignored them; Flynn resigned in February.

When Russia tried to influence the U.S. presidential election, who knew it was happening? Who helped, and who was exploited? And in the months since, who leaked classified intel, and why?