SPOILERS: It won't happen.
I'll accept that challenge.
Native Americans - Have been forcibly removed from their lands, conquered, murdered, and raped for over 500 years. In today's society, the only oppression that they face is the intrusion of business and government on their specified lands. All native Reservations are under their own laws and are governed independent of the United States government, yet companies are allowed to construct pipelines on their land that they own. This is unconstitutional on every level, as private companies don't have the right to construct things on your property unless you give them the right or the government has a warranty. The natives are being oppressed in the sense that they are losing the right to their land that they legally own and govern.
Illegal Immigrants - although they moved to the united states illegally, they are still human beings, and can still be oppressed. There have been intensive reports on businesses hiring illegal immigrants cheaply and extorting them under the condition that they may be deported if they are revealed.
African Americans - self explanatory. Today, oppression isn't as bad as it was before but there's still a huge segregation of school systems. Since african americans are statistically poor
due to the lasting effects of slavery, segregation etc. they are often forced to attend zone schools, which like their neighborhoods, are poorly maintained, underfunded, and generally stuffty. As they grow up, their teachers make no attempt to help them, much of the schools problems go unsolved and in general a large portion of black teens grow up thinking that they are bad students and have no future. The teachers treat them like such, and as a result the mentality grows and affects other students, resulting in increased crime rates, poorer grades, violence, etc. States make little to no effort to fund these schools, and rarely document the actual states of their schools.

You're probably going to say something along the lines of "well thats not oppression!" and i'm just going to preemptively call you an idiot just so i can quote it before you say it. You're also probably going to say "well its their fault!!!" or something along those lines and to that i'm going to refute it with the concept of white guilt.