WASHINGTON — A top security official in U.S. President Donald Trump's administration resigned over the war in Iran on Tuesday, saying the country had posed no imminent threat to the United States. Joe Kent, who headed the National Counterterrorism Center, is the first senior official in Trump's administration to resign over the conflict, now in its third week. "I cannot in good conscience support the ongoing war in Iran. Iran posed no imminent threat to our nation, and it is clear that we started this war due to pressure from Israel and its powerful lobby," Kent wrote in a letter posted to social media. Some experts have said an imminent threat would be required for the United States to launch a war under the international law of war. Kent and the White House did not immediately respond to requests for comment. The Office of the Director of National Intelligence, which oversees the counterterrorism center, also did not immediately respond. Kent known for opposing military interventions Kent has long been known for his "America First" beliefs and has said he opposes U.S. military intervent