如果只是你所说的那些，

个人感觉希望不大。 at-will employment, 本来就是可以
terminate without cause. 想想有没有更好的证据吧，
好比说他说过什么话， 对你有没有不尊重， any kind of
harassment, etc.

also i think the statute of limitation is quite short for
employment discrimination. the time starts from the
day the event happened. not from the day you are terminated. maybe it's 2 years，or 6 month. ？ don't
quite remember. there's also labor department that might
be able to help you on that.

建议，如果需要法律意见， 不要到论坛上来。 直接找律师。
论坛上不可能给你法律意见。 律师的职业道德也不允许律师
在这种地方给法律意见。 有人愿意给你意见当然好，可是这
不能取代你去找律师。