I'm a former Landlord, so my advise to you is this. Talk to your landlord, let them know your situation and see if they are willing to let you out of the lease, with the understanding that your husband will be staying in the property and will be responsible for the for the full amount of the rent the remainder of the time on the existing lease.
The other thing that I would like to give you is a link to a couple of Website.
http://www.ag.state.mn.us/CONSUMER/housing/lt/default.htm
this is from the Attorney Generals office regarding landlords and Tenants rights and responsibilities
http://tenant.net/Other_Areas/Minnesota/ppgmnllt.html
A compilation of resources dealing with landlord-tenant laws in the state of Minnesota
The law is pretty cut and dry, the discrestion falls on what the landlord is willing to do now at this point. I know what I would do in this situation, but what I would need to do, would unfortunally flag your husband that you want out and I dont know if you want him to have that information.
In order to let you out of the lease, I would have to have him sign an amended lease stating that he is the only one on the lease and is responsible for the full balance of the rent due each month. If he is however unwilling to sign such a document, you could still move out but would still be responsible for whatever rent he doesn't pay during the remainder of your lease. Its not to be mean to you, I know that this is a hard situation that you are in, but as a landlord you still have to look out for your interests. Now that is the proper way of doing things, some landlords would probably let you out without you signing or your husband signing anything and you would think that is the end of it. The down side comes in when your husband doesnt pay and the landlord wants their money, they could take you both to court to get that lost rental income.
Make sure that if you do get out and your husband does sign a document stating that he is responsible for the full balance of the rent due each month, that you get a copy of that document. That is your CYA if he ever try's to take you to court to get any of that rent money back from you, and to also protect you from a crooked landlord from doing something similar.
I wish you and yours the best