It is not enough time because you have to go through the customs first. For non-US citizens, the line is usually pretty long. However, since it is the same airline, they will most likely get you rebooked on the next flight so it is really not a big deal.
AA芝加哥与纽约间航班大概一个小时就有一班。每天最早05:50最晚20:45有22个航班。