I did a search, but could not find the answer.

I plan to fly Washngton DC to Paris on Air Canada with an hour connection in Toronto. Both legs are on Air Canada.

The connection time is one hour.

My question is whether I need to claim bags and clear both custom immigration in Toronto? One hour does not seem to be enough time. I hope it is as simple as check the bags all the though to Paris when I check in at DCA, and no immigration clearance.

I would appreciate an response to my question.

thank you!