Abolishing Reservations??

I was living in Germany for the last 20 years and now am back in the USA. I am attending college in WA, State and recently heard from one of my professors that there are those who believe that the reservations should be abolished.  this will be the theme of my next essay, but I know little about it.

Is is a political movement, a law trying to be put into effect, a concept from the grassroots?

Can anyone help me understand this, and moreover, tell me, as Native Americans what you think about this?

Thanks a lot and have a great day!