Live in Maine. Have a condo in connecticut with a big mortgage. Have credit card debt.

Yes, you can file bankruptcy in Maine if you have resided there for more than the last 3 months.  As far as "including" the condo, I don't know what you mean by "include".   You must list all assets and all debts in any bankruptcy case.   If you're talking about letting the condo be foreclosed on or otherwise sold and are asking whether any deficiency balance owed is dischargeable in bankruptcy, the answer is yes, but there may be tax consequences which should be analyzed before you take any actions such as filing a bankruptcy case. Mark Markus has been practicing exclusively bankruptcy law in California since 1991.  He is a Certified Specialist in Bankruptcy Law by the State Bar of California Board of Legal Specialization,  AV-Rated by martindale.com, and A+ rated by the Better Business Bureau.