US President Donald Trump declared the start of "major combat operations in Iran" to "to defend the American people by eliminating imminent threats from the Iranian regime" on February 28. Trump's "combat operations" have, so far, managed to decimate the largest sections of Iran's top governing and military echelons, including killing its supreme leader Ayatollah Ali Khamenei, and resulted in the conflict spreading across West Asia as Iranian munitions hit targets in Saudi Arabia, the UAE, Qatar and others. But there are two inter-related questions—Why isn't Trump calling it "war" and are his military actions legal? The power to declare...