What objection was raised when the president announced that the united states was invading iraq?

The objection that was raised when the president announced that the United state was invading Iraq was "Oil prices will increase because US companies would have limited supplies".

EXPLANATION:

Oil remained as one of the central pillars of the world. The main aim of the United state is to capture  Iraq oil production. Knowing this Iraq limited its oil supply to the US during the Iraq war. The halt in oil imports increased the demand for oil in the country. Thus people faced scarcity of oil during the Iraq war. This also increased the oil rate drastically. Also, this restricted the US from using oil based weapons.

because the vietnam war was fought in an especially brutal and untraditional way

missouri compromise of 1820 which prohibited slavery