I think the correct answer would be the supreme court to declare laws unconstitutional, thereby striking them down. It is the responsibility or the duty of the judicial branch for them to determine a certain law is constitutional or not. Hope this helps.
Apart from severe economic troubles generated by ther articles of confederation, one of the troubling events was Shay's rebellion which occured in 1787, casued by high taxes in Massachusetts. The local rebellion lead by Daneil Shay used violence to close several local courts as well as challenge the supreme court of Massachusetts to prevent foreclosure and debt processing. The rebellion was eventuallt halted and stopped by the militia and thus showed the failings of the articles of confederation. This even showed that a strong federal government was necessarily to prevent and contain such events as Shay's rebellion. This was one of the principle reasons the Articles of Confederation was rewritten into the Consitution of the United States.
African Americans had to pay a tax in order to vote. They also had to take a literacy test to see if they could read but they failed it anyway so they could not vote. The Grandfather Clause states that their grandfather could not be slave in order to vote. But slavery had ended a few years back which made most not being a able to vote.
This is not sexual harassment. The U.S. Supreme Court held that sexual harassment law does not cover ordinary "inter sexual flirtation." Someone can prove sexual harassment if rejecting a supervisor’s sexual advances led to a demotion, firing, or altered work assignment or if a hostile work environment is created by the sexual conduct.