Can I apply for the Connecticut driver's license with the temporary license of Illinois state? Since my physical card takes 3 weeks to get delivered to my mail address, I am planning to exchange my license instead of waiting for Illinois's license.

If you can make a change from the State of Illinois to connecticut they do it the same day but you have to go very early to get the number If you can make a change from the State of Illinois to connecticut they do it the same day but you have to go very early to get the number

I'm not sure about that. I would've call them and ask questions about that before wasting your time at the dmv line