One reason Andrew Jackson was considered a champion of the "common man" was because he

Fought in the war of 1812

Explanation:

Andrew Jackson became the 7th President of the United States. He is considered a champion of the common man because of his humble background. He became orphan at a younger age, and had no connection with wealthy aristocrats. To achieve greatness in life, he struggles as a common man like fighting for the nation and showing interest in politics.  He fought in the American Revolution and the war of 1812.

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories

answer; i believe that the correct answer is,lies(political rhetoric);