If you can vote, hold political office, own property, work for equal pay, and freely marry and divorce, you are not being oppressed. You have the same rights as everyone else in society. You are not a second-class citizen.
Second-class citizens, as their name implies, are people who are systematically denied the same legal rights of other citizens. With the exception of the LGBT community, there are no second-class citizens in America. Everyone has the exact same legal rights as everyone else, regardless of race, gender, class, or religion.
But this does not mean that oppression does not exist in America. It most certainly does. But it's not based on race or gender or sex or class or religion. The real struggle is not between blacks and whites. It is not between men and women. It is not between gays and straights. It is not between rich and poor. It is not between Christians or Muslims or Jews or atheists. The current struggle is between those with political power and those without it. The real source of oppression is the political elite: the government and the corporations that profit from it.
Fortunately for them, nobody notices their oppression. While the rest of us are busy fighting amongst ourselves over trivial differences, the political elite are slowly chipping away at our rights as individual citizens. They currently have the power to target American citizens for indefinite detention, lethal force, and even assassination. They have accomplished so much because we have remained divided amongst ourselves. They benefit from our division because it diverts our attention from them and their oppression.
If we are to stop them, we must cease fighting amongst ourselves and start fighting the real enemy. As the old saying goes: united we stand, divided we fall!