Although Andrew Jackson was a war hero, a champion of the common man, and a popular president, his shameful treatment of slaves and Native Americans should disqualify him from being on the $20 bill.
While leading troops against Native Americans, Jackson favored killing women and children after massacres to eliminate future threats. As a prosperous slave owner, he sympathized with those who wanted tribal land for cotton production. As President, he passed the Indian Removal Act and initiated the forced removal we now call the Trail of Tears. When the Supreme Court sided with the Cherokee, Jackson became the only president to openly defy a Supreme Court ruling.
Even by the standards of his time, he was vindictive and dishonorable. Certainly, we can find a better role model than Jackson!