They can still harass you if you just tell them you arew a citizen but what if they do n't believe you when you have no paper for proof?

If they harass you too mcuh sure you can file lawsuit later. But the first thing to do is to avoid it in teh first place. It is no fun to be a victim and then get justice done.

passport card only cost 20 bucks if appiled together with passport. 35 applied alone