It was challenged in the case Korematsu vs US
No one. Impeachment does not mean kicked out of office. It means that they were brought to trial. If they were to be kicked out of office, though, the Speaker of the House would then become President.
Answer:
It provided Spain with free Native-American labor to produce more crops cheaply.
Explanation:
The Spanish collected tributes and crops from Native Americans, whom they forced to work for them. Because they didn't have to pay them like they would have to with Spanish laborers, they could harvest more crops for trade and export for a lower cost. This built Spain's economy, allowing even more power and conquest of the New World.
The major downfall of the Articles of Confederation was simply weakness. The federal government, under the Articles, was too weak to enforce their laws and therefore had no power. The Continental Congress had borrowed money to fight the Revolutionary War and could not repay their debts.