Bomb bomb bomb, bomb bomb Iran
President Trump is the same thing Presidents of both parties have been doing for over two hundred years.
Congresswoman Alexandria Ocasio-Cortez is correct: President Trump should have went to Congress before bombing Iran's nuclear facilities this past weekend. Whether bombing Iran was good policy or not, only Congress has the Constitutional authority to declare war or authorize military action. As the Commander-in-Chief, Trump has the authority to respond to an imminent threat or direct attack against these United States, but the Iranian nuclear program was not an imminent threat.
Now, we should be clear: Trump is far from the only President to do this. The Democrats who defended President Obama ordering the bombing of Libya and Syria, or President Clinton ordering the bombing of Serbia, are correctly viewed with suspicion and distrust. Their opposition to Trump's military strike on Iran is about partisanship, not principle. Many of the same Republicans who support Trump's bombardment excoriated Obama and Clinton for doing the same thing, so they are also rightly viewed with suspicion and distrust. Very few elected officials (such as Senator Rand Paul and Congressman Thomas Massie, both of Kentucky) have been consistent about limiting Presidential warmaking authority.
And no, it is not impeachable. It would be wildly inconsistent to impeach Trump for doing the same thing Presidents have been doing for over two hundred years before Ocasio-Cortez was even born. President Thomas Jefferson did not initially seek Congressional approval to dispatch the U.S. Navy to protect American ships from the Barbary Pirates. This continued through President Nixon ordering operations in Cambodia and to present day. Impeaching Trump for doing the same thing Presidents of both parties have been doing for generations would establish a dangerous precedent and would lead to constant tit-for-tat impeachments.
But with that said, absent an imminent threat or direct attack, Trump simply does not have the authority to launch a military strike on Iran without Congressional authorization. The Founders put that authority in the hands of Congress, not the executive branch. Congress does need to re-assert its proper authority against executive branch overreach that has persisted under both parties on not only warmaking authority, but wide swaths of domestic policy as well. (Remember President Biden implementing a nationwide vaccine mandate by fiat or "forgiving" student loans without Congressional authorization?) We cannot "Make America Great Again" unless we return to the proper checks and balances as outlined in the Constitution.