The first time I went to the United States, I took a plane of Continental Airlines and changed planes at Newark Airport. The stopover time was only one hour and forty minutes.

1 hour and 4 minutes is basically not enough.

the main reason is that it is quite slow when entering the customs. Especially if your luggage is spot-checked, 2% will miss the next flight.

If it is a connecting ticket, the airline will sign the next flight for you free of charge. If there is no next flight, they may sign another airline flight for you (it is only possible, depending on the cooperation with other airlines. I didn't have an AA flight, so I discussed with them. They signed a DELTA flight instead, and UA missed it once. In Chicago, customs officials were very BIAN. After a long delay, I finally signed DELTA and almost missed it, which was the last flight of the day. It was all free. If the flight can't leave on the same day, the airline should provide free accommodation (I have no experience in this international flight, but the airline will provide free accommodation for domestic flights in the United States if the connecting time is not enough)

It is best to put on a bitter gourd face and ask them to change to any airline, but the principle is that you don't have to pay.

There is not enough time. It is definitely free to change to the next flight on the same airline.