Trump Declares Iran Guard 'Terrorist' - War To Follow?

For the first time ever, the United States has declared a foreign country's military force a "terrorist organization." Iran's Revolutionary Guard has most recently been fighting al-Qaeda and ISIS in Syria, but Trump has accused Iran of harboring al-Qaeda. Iran has returned the "favor," designating the US Central Command (CENTCOM) a "terrorist organization." Is this the set-up for war with Iran?