Deputy national security adviser Dina Powell played a big role in helping the Trump administration's Middle East policy.
Rep. Elijah Cummings said the whistleblower came to him in June.
In moving the U.S. embassy to Jerusalem, President Trump is fulfilling a campaign promise. But that might also hurt the Middle East peace process.
News outlets say allies are criticizing the U.S.' expected announcement on Jerusalem and threats to walk away from the Iran deal.
President Donald Trump is expected to formally recognize Jerusalem as the capital of Israel and relocate the U.S. Embassy to the city from Tel Aviv.
And some British politicians are calling for the prime minister to fire him because of it.
President Trump's latest travel ban prevents a Yemeni journalist from accepting her award in New York.
The defense system is meant to protect them from neighbors like Iran.
The U.S. asked the government of Iraq's Kurdistan region to hold off on its push for independence to instead focus on fighting ISIS.
The drills will include ground, air, sea and intelligence forces and focus on defending an attack along Israel's northern border.
Israel is building an underground barrier along its border with the Gaza Strip to prevent Hamas from using tunnels in and out of the area.
The Trump administration is reportedly considering a controversial plan to privatize the U.S. war in Afghanistan with security contractors.