Originally Posted by Malign0n

^What he said.

They will not deport you if you are denied because you forgot to submit evidence or you abandoned you application.

They can deport you if they think you are a criminal or a threat to society. That being said, you should not apply if you have serious criminal charges (felonies or 3+ misdemeanors). If you do have misdemeanors, you should talk with a lawyer.

Traffic misdemeanors do not count unless it's Driving Under the Influence.