Will I lose my Green Card, if I have a conviction for an aggravated felony?
You will lose your Green Card if you have a conviction for an aggravated felony, unless you can apply for political asylum in some capacity.
If you adjusted status in the US and you have an immediate relative that can apply for you again, you might be eligible for a 212(h) waiver.
If your conviction was before April 30, 1996, and it is an aggravated felony, you probably will be eligible for a 212(c) waiver, and be able to keep and fight for your Green Card, or remain in the United States.